Make ProxyTracer private

Author: anton-ryzhov

opentelemetry-api/src/opentelemetry/trace/__init__.py

@@ -410,7 +410,7 @@ def use_span(
         yield
 
 
-class ProxyTracer(Tracer):
+class _ProxyTracer(Tracer):
     """Proxies all calls to current TracerProvider
     """
 
@@ -491,11 +491,11 @@ def get_tracer(
 ) -> "Tracer":
     """Returns a `Tracer` for use by the given instrumentation library.
 
-    If tracer_provider is ommited it returns a ProxyTracer
+    If tracer_provider is ommited it returns a _ProxyTracer
     which redirects calls to a current instrumentation library.
     """
     if tracer_provider is None:
-        return ProxyTracer(
+        return _ProxyTracer(
             functools.partial(
                 _get_current_tracer,
                 instrumenting_module_name=instrumenting_module_name,

opentelemetry-api/tests/trace/test_globals.py

@@ -16,7 +16,7 @@ def test_get_tracer(self):
         """trace.get_tracer should create a proxy to the global tracer provider."""
         tracer = trace.get_tracer("foo", "var")
         self._mock_tracer_provider.get_tracer.assert_not_called()
-        self.assertIsInstance(tracer, trace.ProxyTracer)
+        self.assertIsInstance(tracer, trace._ProxyTracer)
 
         tracer.start_span("one")
         tracer.start_span("two")