code: public void setLayerInsetRelative(int index, int s, int t, int e, int b) {
          setLayerInsetInternal(index, 0, t, 0, b, s, e);
      }
docs: Specifies the relative insets in pixels for the drawable at the specified index.
  
  @param index the index of the layer to adjust
  @param s     number of pixels to inset from the start bound
  @param t     number of pixels to inset from the top bound
  @param e     number of pixels to inset from the end bound
  @param b     number of pixels to inset from the bottom bound
  @attr ref android.R.styleable#LayerDrawableItem_start
  @attr ref android.R.styleable#LayerDrawableItem_top
  @attr ref android.R.styleable#LayerDrawableItem_end
  @attr ref android.R.styleable#LayerDrawableItem_bottom