public Builder addCommandBytes(
        com.google.protobuf.ByteString value) {
      if (value == null) { throw new NullPointerException(); }
      checkByteStringIsUtf8(value);
      ensureCommandIsMutable();
      command_.add(value);
      bitField0_ |= 0x00000001;
      onChanged();
      return this;
    }
public Builder addCommandBytes(
        com.google.protobuf.ByteString value)