ParseEnumConstant 1257 third_party/protobuf/src/google/protobuf/compiler/parser.cc     return ParseEnumConstant(enum_type->add_value(), location);
ParseEnumConstant  347 third_party/protobuf/src/google/protobuf/compiler/parser.h   bool ParseEnumConstant(EnumValueDescriptorProto* enum_value,