code: @Override
      @CheckReturnValue
      public MessageAction append(final CharSequence csq)
      {
          return append(csq, 0, csq.length());
      }
docs: {@inheritDoc}
  @throws java.lang.IllegalArgumentException
  If the appended CharSequence is too big and will cause the content to
  exceed the {@value net.dv8tion.jda.core.entities.Message#MAX_CONTENT_LENGTH} character limit
  
  @return Updated MessageAction for chaining convenience