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