private void ensureOutputIsMutable() {
          if (!((bitField0_ & 0x00000040) != 0)) {
            output_ = new java.util.ArrayList<org.jetbrains.jps.javac.rpc.JavacRemoteProto.Message.Request.OutputGroup>(output_);
            bitField0_ |= 0x00000040;
           }
        }
private void ensureOutputIsMutable()