code: public final void setSize(@NonNull final Size size) {
          Condition.INSTANCE.ensureNotNull(size, "The size may not be null");
          this.size = size;
          adaptShadow();
          adaptImageButtonSize();
          requestLayout();
      }
docs: Sets the floating action button's size.
  
  @param size
  The size, which should be set, as a value of the enum {@link Size}. The size must
  either be <code>NORMAL</code> or <code>SMALL</code>