code: public final void setBackgroundColor(@ColorInt final int color) {
          this.background = new ColorDrawable(color);
          this.backgroundBitmap = null;
          this.backgroundId = -1;
          this.backgroundColor = color;
          adaptBackground();
      }
docs: Sets the background color of the bottom sheet.
  
  @param color
  The background color, which should be set, as an {@link Integer} value or -1, if no
  custom background color should be set