public Builder clear() {
        super.clear();
        if (recipientBuilder_ == null) {
          recipient_ = JOutPiqi.recipient.getDefaultInstance();
        } else {
          recipientBuilder_.clear();
        }
        bitField0_ = (bitField0_ & ~0x00000001);
        commandName_ = "";
        bitField0_ = (bitField0_ & ~0x00000002);
        commandArgs_ = java.util.Collections.emptyList();;
        bitField0_ = (bitField0_ & ~0x00000004);
        return this;
      }