@java.lang.Override
  public Builder toBuilder() {
    return this == DEFAULT_INSTANCE
        ? new Builder() : new Builder().mergeFrom(this);
  }
<code>repeated string argTypes = 3;</code>
@param index The index of the value to return.
@return The bytes of the argTypes at the given index.
remoting/remoting-triple/build/generated/source/proto/main/java/triple/Request.java