code: @SuppressWarnings("WeakerAccess")
    public SnackbarBuilder iconMarginRes(@DimenRes int iconMarginResId) {
      return iconMargin(
          context.getResources().getDimensionPixelSize(iconMarginResId));
    }
docs: Set the margin to be displayed between the icon and the text.
  
  @param iconMarginResId The dimension resource of the margin before the icon.
  @return This instance.