code: private void inflateMessageContainer() {
          if (messageContainer == null) {
              messageContainer = new RelativeLayout(getContext());
              messageContainer.setId(R.id.message_container);
              messageContainer.setLayoutParams(
                      new ViewGroup.LayoutParams(ViewGroup.LayoutParams.MATCH_PARENT,
                              ViewGroup.LayoutParams.WRAP_CONTENT));
          } else {
              messageContainer.removeAllViews();
          }
      }
docs: Inflates the container, which contains the dialog's message, if it is not yet inflated.