code: public void morphIntoFab(View fab, long hideSheetDuration, long hideSheetColorDuration,
  			AnimationListener listener) {
  		revealSheetWithFab(fab, getSheetRevealRadius(), getFabRevealRadius(fab), hideSheetDuration,
  				sheetColor, fabColor, hideSheetColorDuration, listener);
  	}
docs: Hides the sheet by morphing the sheet into the FAB.
  
  @param fab Floating action button
  @param hideSheetDuration Duration of the sheet animation in milliseconds. Use 0 for no
  animation.
  @param hideSheetColorDuration Duration of the color animation in milliseconds. Use 0 for no
  animation.
  @param listener Listener for animation events.