code: public final void setCloseButtonIcon(@NonNull final Drawable icon) {
          Condition.INSTANCE.ensureNotNull(icon, "The icon may not be null");
          closeButton.setImageDrawable(icon);
      }
docs: Sets the icon of the button, which allows to close the chip.
  
  @param icon
  The icon, which should be set, as an instance of the class {@link Drawable}. The icon
  may not be null