code: @SuppressWarnings("unused")
      public void setIndicatorWidth(int indicatorWidth) {
          mIndicatorWidth = indicatorWidth;
          mIndicatorRectangle.set(getPaddingLeft(), getPaddingTop(), getPaddingLeft() + mIndicatorWidth, getMeasuredHeight() - getPaddingBottom());
          requestLayout();
      }
docs: Set indicator width
  @param indicatorWidth indicator width in px