Upgrade to Kotlin 2.1.10

- Upgrade kotlinVersion to 2.1.10 - Remove org.jetbrains.kotlin:kotlin-compiler-embeddable from dependencies - Replace deprecated kotlinOptions with compilerOptions - Update KotlinConventions of ConventionsPlugin to set Kotlin apiVersion and languageVersion to 2.1 - Move spring-boot-doc Kotlin examples to kotlin subpackage to prevent Redeclaration compile error - Upgrade PluginClasspathGradleBuild to inject missed Kotlin compiler related jars See gh-38539 Signed-off-by: Dmitry Sulman <[email protected]>
spring-projects · Feb 28, 2025 · 1d9bbc4 · 1d9bbc4
1 parent 7b9da78
commit 1d9bbc4
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diff --git a/buildSrc/build.gradle b/buildSrc/build.gradle
@@ -42,7 +42,6 @@ dependencies {
 	implementation("org.apache.maven:maven-embedder:${mavenVersion}")
 	implementation("org.antora:gradle-antora-plugin:1.0.0")
 	implementation("org.jetbrains.kotlin:kotlin-gradle-plugin:${kotlinVersion}")
-	implementation("org.jetbrains.kotlin:kotlin-compiler-embeddable:${kotlinVersion}")
 	implementation("org.springframework:spring-context")
 	implementation("org.springframework:spring-core")
 	implementation("org.springframework:spring-web")

diff --git a/buildSrc/src/main/java/org/springframework/boot/build/ConventionsPlugin.java b/buildSrc/src/main/java/org/springframework/boot/build/ConventionsPlugin.java
@@ -1,5 +1,5 @@
 /*
- * Copyright 2012-2024 the original author or authors.
+ * Copyright 2012-2025 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -35,6 +35,9 @@
  * When the {@link AntoraPlugin} is applied, the conventions in {@link AntoraConventions}
  * are applied.
  *
+ * When the {@code org.jetbrains.kotlin.jvm} plugin is applied, the conventions in
+ * {@link KotlinConventions} are applied.
+ *
  * @author Andy Wilkinson
  * @author Christoph Dreis
  * @author Mike Smithson

diff --git a/buildSrc/src/main/java/org/springframework/boot/build/KotlinConventions.java b/buildSrc/src/main/java/org/springframework/boot/build/KotlinConventions.java
@@ -1,5 +1,5 @@
 /*
- * Copyright 2012-2024 the original author or authors.
+ * Copyright 2012-2025 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -25,7 +25,9 @@
 import org.gradle.api.Project;
 import org.gradle.api.tasks.SourceSet;
 import org.gradle.api.tasks.SourceSetContainer;
-import org.jetbrains.kotlin.gradle.dsl.KotlinJvmOptions;
+import org.jetbrains.kotlin.gradle.dsl.JvmTarget;
+import org.jetbrains.kotlin.gradle.dsl.KotlinJvmCompilerOptions;
+import org.jetbrains.kotlin.gradle.dsl.KotlinVersion;
 import org.jetbrains.kotlin.gradle.tasks.KotlinCompile;
 
 /**
@@ -35,7 +37,7 @@
  * <ul>
  * <li>{@link KotlinCompile} tasks are configured to:
  * <ul>
- * <li>Use {@code apiVersion} and {@code languageVersion} 1.7.
+ * <li>Use {@code apiVersion} and {@code languageVersion} 2.1.
  * <li>Use {@code jvmTarget} 17.
  * <li>Treat all warnings as errors
  * <li>Suppress version warnings
@@ -56,14 +58,14 @@ void apply(Project project) {
 	}
 
 	private void configure(KotlinCompile compile) {
-		KotlinJvmOptions kotlinOptions = compile.getKotlinOptions();
-		kotlinOptions.setApiVersion("1.7");
-		kotlinOptions.setLanguageVersion("1.7");
-		kotlinOptions.setJvmTarget("17");
-		kotlinOptions.setAllWarningsAsErrors(true);
-		List<String> freeCompilerArgs = new ArrayList<>(kotlinOptions.getFreeCompilerArgs());
+		KotlinJvmCompilerOptions kotlinOptions = compile.getCompilerOptions();
+		kotlinOptions.getApiVersion().set(KotlinVersion.KOTLIN_2_1);
+		kotlinOptions.getLanguageVersion().set(KotlinVersion.KOTLIN_2_1);
+		kotlinOptions.getJvmTarget().set(JvmTarget.JVM_17);
+		kotlinOptions.getAllWarningsAsErrors().set(true);
+		List<String> freeCompilerArgs = new ArrayList<>(kotlinOptions.getFreeCompilerArgs().get());
 		freeCompilerArgs.add("-Xsuppress-version-warnings");
-		kotlinOptions.setFreeCompilerArgs(freeCompilerArgs);
+		kotlinOptions.getFreeCompilerArgs().set(freeCompilerArgs);
 	}
 
 	private void configureDokkatoo(Project project) {

diff --git a/...ain/resources/org/springframework/boot/build/antora/antora-asciidoc-attributes.properties b/...ain/resources/org/springframework/boot/build/antora/antora-asciidoc-attributes.properties
@@ -1,7 +1,7 @@
 # === INCLUDE-CODE LOCATIONS ===
 
 include-java=ROOT:example$java/org/springframework/boot/docs
-include-kotlin= ROOT:example$kotlin/org/springframework/boot/docs
+include-kotlin= ROOT:example$kotlin/org/springframework/boot/docs/kotlin
 
 # === URLs ===
 

diff --git a/gradle.properties b/gradle.properties
@@ -14,7 +14,7 @@ hamcrestVersion=3.0
 jacksonVersion=2.18.2
 javaFormatVersion=0.0.43
 junitJupiterVersion=5.11.4
-kotlinVersion=1.9.25
+kotlinVersion=2.1.10
 mavenVersion=3.9.4
 mockitoVersion=5.15.2
 nativeBuildToolsVersion=0.10.5

diff --git a/spring-boot-project/spring-boot-dependencies/build.gradle b/spring-boot-project/spring-boot-dependencies/build.gradle
@@ -1193,8 +1193,9 @@ bom {
 	}
 	library("Kotlin", "${kotlinVersion}") {
 		prohibit {
-			versionRange "[2.0.0-Beta1,)"
-			because "it exceeds our baseline"
+			contains "-Beta"
+			contains "-RC"
+			because "we don't want betas or release candidates"
 		}
 		group("org.jetbrains.kotlin") {
 			imports = [

diff --git a/...ocs/src/main/java/org/springframework/boot/docs/data/nosql/cassandra/connecting/User.java b/...ocs/src/main/java/org/springframework/boot/docs/data/nosql/cassandra/connecting/User.java
@@ -16,6 +16,6 @@
 
 package org.springframework.boot.docs.data.nosql.cassandra.connecting;
 
-class User {
+public class User {
 
 }
diff --git a/...s/features/externalconfig/typesafeconfigurationproperties/usingannotatedtypes/Server.java b/...s/features/externalconfig/typesafeconfigurationproperties/usingannotatedtypes/Server.java
@@ -16,12 +16,12 @@
 
 package org.springframework.boot.docs.features.externalconfig.typesafeconfigurationproperties.usingannotatedtypes;
 
-class Server {
+public class Server {
 
-	Server(Object remoteAddress) {
+	public Server(Object remoteAddress) {
 	}
 
-	void start() {
+	public void start() {
 	}
 
 }
diff --git a/...es/springapplication/applicationavailability/managing/CacheCompletelyBrokenException.java b/...es/springapplication/applicationavailability/managing/CacheCompletelyBrokenException.java
@@ -16,6 +16,6 @@
 
 package org.springframework.boot.docs.features.springapplication.applicationavailability.managing;
 
-class CacheCompletelyBrokenException extends RuntimeException {
+public class CacheCompletelyBrokenException extends RuntimeException {
 
 }
diff --git a/...n/java/org/springframework/boot/docs/web/servlet/springmvc/errorhandling/MyErrorBody.java b/...n/java/org/springframework/boot/docs/web/servlet/springmvc/errorhandling/MyErrorBody.java
@@ -16,9 +16,9 @@
 
 package org.springframework.boot.docs.web.servlet.springmvc.errorhandling;
 
-class MyErrorBody {
+public class MyErrorBody {
 
-	MyErrorBody(int value, String message) {
+	public MyErrorBody(int value, String message) {
 	}
 
 }
diff --git a/...n/java/org/springframework/boot/docs/web/servlet/springmvc/errorhandling/MyException.java b/...n/java/org/springframework/boot/docs/web/servlet/springmvc/errorhandling/MyException.java
@@ -16,6 +16,6 @@
 
 package org.springframework.boot.docs.web.servlet.springmvc.errorhandling;
 
-class MyException extends RuntimeException {
+public class MyException extends RuntimeException {
 
 }
diff --git a/...ava/org/springframework/boot/docs/web/servlet/springmvc/errorhandling/SomeController.java b/...ava/org/springframework/boot/docs/web/servlet/springmvc/errorhandling/SomeController.java
@@ -16,6 +16,6 @@
 
 package org.springframework.boot.docs.web.servlet.springmvc.errorhandling;
 
-class SomeController {
+public class SomeController {
 
 }
diff --git a/...ontextpath/MyCloudFoundryConfiguration.kt → ...ontextpath/MyCloudFoundryConfiguration.kt b/...ontextpath/MyCloudFoundryConfiguration.kt → ...ontextpath/MyCloudFoundryConfiguration.kt
@@ -14,7 +14,7 @@
  * limitations under the License.
  */
 
-package org.springframework.boot.docs.actuator.cloudfoundry.customcontextpath
+package org.springframework.boot.docs.kotlin.actuator.cloudfoundry.customcontextpath
 
 import jakarta.servlet.GenericServlet
 import jakarta.servlet.Servlet

diff --git a/...th/MyReactiveCloudFoundryConfiguration.kt → ...th/MyReactiveCloudFoundryConfiguration.kt b/...th/MyReactiveCloudFoundryConfiguration.kt → ...th/MyReactiveCloudFoundryConfiguration.kt
@@ -13,7 +13,7 @@
  * See the License for the specific language governing permissions and
  * limitations under the License.
  */
-package org.springframework.boot.docs.actuator.cloudfoundry.customcontextpath
+package org.springframework.boot.docs.kotlin.actuator.cloudfoundry.customcontextpath
 
 import org.springframework.boot.autoconfigure.web.reactive.WebFluxProperties
 import org.springframework.boot.context.properties.EnableConfigurationProperties

diff --git a/...thindicators/MyReactiveHealthIndicator.kt → ...thindicators/MyReactiveHealthIndicator.kt b/...thindicators/MyReactiveHealthIndicator.kt → ...thindicators/MyReactiveHealthIndicator.kt
@@ -14,7 +14,7 @@
  * limitations under the License.
  */
 
-package org.springframework.boot.docs.actuator.endpoints.health.reactivehealthindicators
+package org.springframework.boot.docs.kotlin.actuator.endpoints.health.reactivehealthindicators
 
 import org.springframework.boot.actuate.health.Health
 import org.springframework.boot.actuate.health.ReactiveHealthIndicator

diff --git a/...stomhealthindicators/MyHealthIndicator.kt → ...stomhealthindicators/MyHealthIndicator.kt b/...stomhealthindicators/MyHealthIndicator.kt → ...stomhealthindicators/MyHealthIndicator.kt
@@ -14,7 +14,7 @@
  * limitations under the License.
  */
 
-package org.springframework.boot.docs.actuator.endpoints.health.writingcustomhealthindicators
+package org.springframework.boot.docs.kotlin.actuator.endpoints.health.writingcustomhealthindicators
 
 import org.springframework.boot.actuate.health.Health
 import org.springframework.boot.actuate.health.HealthIndicator

diff --git a/...ndpoints/implementingcustom/CustomData.kt → ...ndpoints/implementingcustom/CustomData.kt b/...ndpoints/implementingcustom/CustomData.kt → ...ndpoints/implementingcustom/CustomData.kt
@@ -14,6 +14,6 @@
  * limitations under the License.
  */
 
-package org.springframework.boot.docs.actuator.endpoints.implementingcustom
+package org.springframework.boot.docs.kotlin.actuator.endpoints.implementingcustom
 
 class CustomData(val name: String, val counter: Int)
diff --git a/...ndpoints/implementingcustom/MyEndpoint.kt → ...ndpoints/implementingcustom/MyEndpoint.kt b/...ndpoints/implementingcustom/MyEndpoint.kt → ...ndpoints/implementingcustom/MyEndpoint.kt
@@ -14,7 +14,7 @@
  * limitations under the License.
  */
 
-package org.springframework.boot.docs.actuator.endpoints.implementingcustom
+package org.springframework.boot.docs.kotlin.actuator.endpoints.implementingcustom
 
 import org.springframework.boot.actuate.endpoint.annotation.Endpoint
 import org.springframework.boot.actuate.endpoint.annotation.ReadOperation

diff --git a/...stominfocontributors/MyInfoContributor.kt → ...stominfocontributors/MyInfoContributor.kt b/...stominfocontributors/MyInfoContributor.kt → ...stominfocontributors/MyInfoContributor.kt
@@ -14,7 +14,7 @@
  * limitations under the License.
  */
 
-package org.springframework.boot.docs.actuator.endpoints.info.writingcustominfocontributors
+package org.springframework.boot.docs.kotlin.actuator.endpoints.info.writingcustominfocontributors
 
 import org.springframework.boot.actuate.info.Info
 import org.springframework.boot.actuate.info.InfoContributor

diff --git a/...rity/exposeall/MySecurityConfiguration.kt → ...rity/exposeall/MySecurityConfiguration.kt b/...rity/exposeall/MySecurityConfiguration.kt → ...rity/exposeall/MySecurityConfiguration.kt
@@ -14,7 +14,7 @@
  * limitations under the License.
  */
 
-package org.springframework.boot.docs.actuator.endpoints.security.exposeall
+package org.springframework.boot.docs.kotlin.actuator.endpoints.security.exposeall
 
 import org.springframework.boot.actuate.autoconfigure.security.servlet.EndpointRequest
 import org.springframework.context.annotation.Bean

diff --git a/...curity/typical/MySecurityConfiguration.kt → ...curity/typical/MySecurityConfiguration.kt b/...curity/typical/MySecurityConfiguration.kt → ...curity/typical/MySecurityConfiguration.kt
@@ -14,7 +14,7 @@
  * limitations under the License.
  */
 
-package org.springframework.boot.docs.actuator.endpoints.security.typical
+package org.springframework.boot.docs.kotlin.actuator.endpoints.security.typical
 
 import org.springframework.boot.actuate.autoconfigure.security.servlet.EndpointRequest
 import org.springframework.context.annotation.Bean

diff --git a/...stomizing/MyMetricsFilterConfiguration.kt → ...stomizing/MyMetricsFilterConfiguration.kt b/...stomizing/MyMetricsFilterConfiguration.kt → ...stomizing/MyMetricsFilterConfiguration.kt
@@ -14,7 +14,7 @@
  * limitations under the License.
  */
 
-package org.springframework.boot.docs.actuator.metrics.customizing
+package org.springframework.boot.docs.kotlin.actuator.metrics.customizing
 
 import io.micrometer.core.instrument.config.MeterFilter
 import org.springframework.context.annotation.Bean

diff --git a/...xport/graphite/MyGraphiteConfiguration.kt → ...xport/graphite/MyGraphiteConfiguration.kt b/...xport/graphite/MyGraphiteConfiguration.kt → ...xport/graphite/MyGraphiteConfiguration.kt
@@ -14,7 +14,7 @@
  * limitations under the License.
  */
 
-package org.springframework.boot.docs.actuator.metrics.export.graphite
+package org.springframework.boot.docs.kotlin.actuator.metrics.export.graphite
 
 import io.micrometer.core.instrument.Clock
 import io.micrometer.core.instrument.Meter

diff --git a/.../metrics/export/jmx/MyJmxConfiguration.kt → .../metrics/export/jmx/MyJmxConfiguration.kt b/.../metrics/export/jmx/MyJmxConfiguration.kt → .../metrics/export/jmx/MyJmxConfiguration.kt
@@ -14,7 +14,7 @@
  * limitations under the License.
  */
 
-package org.springframework.boot.docs.actuator.metrics.export.jmx
+package org.springframework.boot.docs.kotlin.actuator.metrics.export.jmx
 
 import io.micrometer.core.instrument.Clock
 import io.micrometer.core.instrument.Meter

diff --git a/...ommontags/MyMeterRegistryConfiguration.kt → ...ommontags/MyMeterRegistryConfiguration.kt b/...ommontags/MyMeterRegistryConfiguration.kt → ...ommontags/MyMeterRegistryConfiguration.kt
@@ -14,7 +14,7 @@
  * limitations under the License.
  */
 
-package org.springframework.boot.docs.actuator.metrics.gettingstarted.commontags
+package org.springframework.boot.docs.kotlin.actuator.metrics.gettingstarted.commontags
 
 import io.micrometer.core.instrument.MeterRegistry
 import org.springframework.boot.actuate.autoconfigure.metrics.MeterRegistryCustomizer

diff --git a/...cifictype/MyMeterRegistryConfiguration.kt → ...cifictype/MyMeterRegistryConfiguration.kt b/...cifictype/MyMeterRegistryConfiguration.kt → ...cifictype/MyMeterRegistryConfiguration.kt
@@ -14,7 +14,7 @@
  * limitations under the License.
  */
 
-package org.springframework.boot.docs.actuator.metrics.gettingstarted.specifictype
+package org.springframework.boot.docs.kotlin.actuator.metrics.gettingstarted.specifictype
 
 import io.micrometer.core.instrument.Meter
 import io.micrometer.core.instrument.config.NamingConvention

diff --git a/...r/metrics/registeringcustom/Dictionary.kt → ...r/metrics/registeringcustom/Dictionary.kt b/...r/metrics/registeringcustom/Dictionary.kt → ...r/metrics/registeringcustom/Dictionary.kt
@@ -14,7 +14,7 @@
  * limitations under the License.
  */
 
-package org.springframework.boot.docs.actuator.metrics.registeringcustom
+package org.springframework.boot.docs.kotlin.actuator.metrics.registeringcustom
 
 internal class Dictionary {
 

diff --git a/...uator/metrics/registeringcustom/MyBean.kt → ...uator/metrics/registeringcustom/MyBean.kt b/...uator/metrics/registeringcustom/MyBean.kt → ...uator/metrics/registeringcustom/MyBean.kt
@@ -14,7 +14,7 @@
  * limitations under the License.
  */
 
-package org.springframework.boot.docs.actuator.metrics.registeringcustom
+package org.springframework.boot.docs.kotlin.actuator.metrics.registeringcustom
 
 import io.micrometer.core.instrument.MeterRegistry
 import io.micrometer.core.instrument.Tags

diff --git a/...eringcustom/MyMeterBinderConfiguration.kt → ...eringcustom/MyMeterBinderConfiguration.kt b/...eringcustom/MyMeterBinderConfiguration.kt → ...eringcustom/MyMeterBinderConfiguration.kt
@@ -14,7 +14,7 @@
  * limitations under the License.
  */
 
-package org.springframework.boot.docs.actuator.metrics.registeringcustom
+package org.springframework.boot.docs.kotlin.actuator.metrics.registeringcustom
 
 import io.micrometer.core.instrument.Gauge
 import io.micrometer.core.instrument.binder.MeterBinder

diff --git a/...tuator/metrics/registeringcustom/Queue.kt → ...tuator/metrics/registeringcustom/Queue.kt b/...tuator/metrics/registeringcustom/Queue.kt → ...tuator/metrics/registeringcustom/Queue.kt
@@ -14,7 +14,7 @@
  * limitations under the License.
  */
 
-package org.springframework.boot.docs.actuator.metrics.registeringcustom
+package org.springframework.boot.docs.kotlin.actuator.metrics.registeringcustom
 
 class Queue {
 

diff --git a/...godb/command/CustomCommandTagsProvider.kt → ...godb/command/CustomCommandTagsProvider.kt b/...godb/command/CustomCommandTagsProvider.kt → ...godb/command/CustomCommandTagsProvider.kt
@@ -14,7 +14,7 @@
  * limitations under the License.
  */
 
-package org.springframework.boot.docs.actuator.metrics.supported.mongodb.command
+package org.springframework.boot.docs.kotlin.actuator.metrics.supported.mongodb.command
 
 import com.mongodb.event.CommandEvent
 import io.micrometer.core.instrument.Tag

diff --git a/...and/MyCommandTagsProviderConfiguration.kt → ...and/MyCommandTagsProviderConfiguration.kt b/...and/MyCommandTagsProviderConfiguration.kt → ...and/MyCommandTagsProviderConfiguration.kt
@@ -14,7 +14,7 @@
  * limitations under the License.
  */
 
-package org.springframework.boot.docs.actuator.metrics.supported.mongodb.command
+package org.springframework.boot.docs.kotlin.actuator.metrics.supported.mongodb.command
 
 import io.micrometer.core.instrument.binder.mongodb.MongoCommandTagsProvider
 import org.springframework.context.annotation.Bean

diff --git a/...npool/CustomConnectionPoolTagsProvider.kt → ...npool/CustomConnectionPoolTagsProvider.kt b/...npool/CustomConnectionPoolTagsProvider.kt → ...npool/CustomConnectionPoolTagsProvider.kt
@@ -14,7 +14,7 @@
  * limitations under the License.
  */
 
-package org.springframework.boot.docs.actuator.metrics.supported.mongodb.connectionpool
+package org.springframework.boot.docs.kotlin.actuator.metrics.supported.mongodb.connectionpool
 
 import com.mongodb.event.ConnectionPoolCreatedEvent
 import io.micrometer.core.instrument.Tag

diff --git a/...onnectionPoolTagsProviderConfiguration.kt → ...onnectionPoolTagsProviderConfiguration.kt b/...onnectionPoolTagsProviderConfiguration.kt → ...onnectionPoolTagsProviderConfiguration.kt
@@ -14,7 +14,7 @@
  * limitations under the License.
  */
 
-package org.springframework.boot.docs.actuator.metrics.supported.mongodb.connectionpool
+package org.springframework.boot.docs.kotlin.actuator.metrics.supported.mongodb.connectionpool
 
 import io.micrometer.core.instrument.binder.mongodb.MongoConnectionPoolTagsProvider
 import org.springframework.context.annotation.Bean

diff --git a/...plerepackageimplementation/MyBuildTool.kt → ...plerepackageimplementation/MyBuildTool.kt b/...plerepackageimplementation/MyBuildTool.kt → ...plerepackageimplementation/MyBuildTool.kt
@@ -14,7 +14,7 @@
  * limitations under the License.
  */
 
-package org.springframework.boot.docs.buildtoolplugins.otherbuildsystems.examplerepackageimplementation
+package org.springframework.boot.docs.kotlin.buildtoolplugins.otherbuildsystems.examplerepackageimplementation
 
 import org.springframework.boot.loader.tools.Library
 import org.springframework.boot.loader.tools.LibraryCallback

diff --git a/...tadatageneration/MyMessagingProperties.kt → ...tadatageneration/MyMessagingProperties.kt b/...tadatageneration/MyMessagingProperties.kt → ...tadatageneration/MyMessagingProperties.kt
@@ -14,7 +14,7 @@
  * limitations under the License.
  */
 
-package org.springframework.boot.docs.configurationmetadata.annotationprocessor.automaticmetadatageneration
+package org.springframework.boot.docs.kotlin.configurationmetadata.annotationprocessor.automaticmetadatageneration
 
 import org.springframework.boot.context.properties.ConfigurationProperties
 import java.util.Arrays

diff --git a/...cmetadatageneration/MyServerProperties.kt → ...cmetadatageneration/MyServerProperties.kt b/...cmetadatageneration/MyServerProperties.kt → ...cmetadatageneration/MyServerProperties.kt
@@ -14,7 +14,7 @@
  * limitations under the License.
  */
 
-package org.springframework.boot.docs.configurationmetadata.annotationprocessor.automaticmetadatageneration
+package org.springframework.boot.docs.kotlin.configurationmetadata.annotationprocessor.automaticmetadatageneration
 
 import org.springframework.boot.context.properties.ConfigurationProperties
 

diff --git a/...on/nestedproperties/MyServerProperties.kt → ...on/nestedproperties/MyServerProperties.kt b/...on/nestedproperties/MyServerProperties.kt → ...on/nestedproperties/MyServerProperties.kt
@@ -14,7 +14,7 @@
  * limitations under the License.
  */
 
-package org.springframework.boot.docs.configurationmetadata.annotationprocessor.automaticmetadatageneration.nestedproperties
+package org.springframework.boot.docs.kotlin.configurationmetadata.annotationprocessor.automaticmetadatageneration.nestedproperties
 
 import org.springframework.boot.context.properties.ConfigurationProperties