public Builder clearArgTypes() {
      argTypes_ =
        com.google.protobuf.LazyStringArrayList.emptyList();
      bitField0_ = (bitField0_ & ~0x00000004);;
      onChanged();
      return this;
    }
<code>repeated string argTypes = 3;</code>
@return This builder for chaining.
remoting/remoting-triple/build/generated/source/proto/main/java/triple/Request.java