code: private void inflateContentContainer() {
          if (contentContainer == null) {
              contentContainer = new RelativeLayout(getContext());
              contentContainer.setId(R.id.content_container);
              LinearLayout.LayoutParams layoutParams =
                      new LinearLayout.LayoutParams(LinearLayout.LayoutParams.MATCH_PARENT, 0);
              layoutParams.weight = 1;
              contentContainer.setLayoutParams(layoutParams);
          } else {
              contentContainer.removeAllViews();
          }
      }
docs: Inflates the container, which contains the dialog's content, if it is not yet inflated.