public Builder clear() {
        super.clear();
        ctype_ = com.google.protobuf.DescriptorProtos.FieldOptions.CType.STRING;
        bitField0_ = (bitField0_ & ~0x00000001);
        packed_ = false;
        bitField0_ = (bitField0_ & ~0x00000002);
        lazy_ = false;
        bitField0_ = (bitField0_ & ~0x00000004);
        deprecated_ = false;
        bitField0_ = (bitField0_ & ~0x00000008);
        experimentalMapKey_ = "";
        bitField0_ = (bitField0_ & ~0x00000010);
        weak_ = false;
        bitField0_ = (bitField0_ & ~0x00000020);
        if (uninterpretedOptionBuilder_ == null) {
          uninterpretedOption_ = java.util.Collections.emptyList();
          bitField0_ = (bitField0_ & ~0x00000040);
        } else {
          uninterpretedOptionBuilder_.clear();
        }
        return this;
      }