ProtocolMessageEnum 1269 third_party/protobuf/java/src/main/java/com/google/protobuf/GeneratedMessage.java       if (ProtocolMessageEnum.class.isAssignableFrom(singularType)) {
ProtocolMessageEnum  501 third_party/protobuf/java/src/test/java/com/google/protobuf/GeneratedMessageTest.java         instanceof ProtocolMessageEnum);
ProtocolMessageEnum  250 third_party/protobuf/java/src/test/java/com/google/protobuf/ServiceTest.java           !ProtocolMessageEnum.class.isAssignableFrom(innerClass)) {