code: private int getPixelSize() {
          if (getSize() == Size.NORMAL) {
              return getResources().getDimensionPixelSize(R.dimen.floating_action_button_size_normal);
          } else if (getSize() == Size.SMALL) {
              return getResources().getDimensionPixelSize(R.dimen.floating_action_button_size_small);
          } else {
              return getResources().getDimensionPixelSize(R.dimen.floating_action_button_size_large);
          }
      }
docs: Returns the size of the floating action button in pixels, depending on its current size.
  
  @return The size of the floating action button in pixels as an {@link Integer} value