code: public void setBody(CharSequence body) {
          String bodyString;
          if (body != null) {
              bodyString = body.toString();
          } else {
              bodyString = null;
          }
          setBody(bodyString);
      }
docs: Sets the body of the message.
  
  @param body the body of the message.
  @see #setBody(String)
  @since 4.2