split iterator into its own file
diff --git a/tools/doxygen/Doxyfile.c++.internal b/tools/doxygen/Doxyfile.c++.internal
index 67718d8..d431495 100644
--- a/tools/doxygen/Doxyfile.c++.internal
+++ b/tools/doxygen/Doxyfile.c++.internal
@@ -763,6 +763,7 @@
INPUT = include/grpc++/async_generic_service.h \
include/grpc++/async_unary_call.h \
include/grpc++/auth_context.h \
+include/grpc++/auth_property_iterator.h \
include/grpc++/byte_buffer.h \
include/grpc++/channel_arguments.h \
include/grpc++/channel_interface.h \
@@ -806,6 +807,7 @@
src/cpp/server/thread_pool.h \
src/cpp/client/secure_channel_arguments.cc \
src/cpp/client/secure_credentials.cc \
+src/cpp/common/auth_property_iterator.cc \
src/cpp/common/secure_auth_context.cc \
src/cpp/common/secure_create_auth_context.cc \
src/cpp/server/secure_server_credentials.cc \