question: public FloatingActionButton createSubFAB ( char icon , String text ) { FloatingActionButton sub = new FloatingActionButton ( icon , text , 2.8f ) ; if ( subMenu == null ) { subMenu = new ArrayList < FloatingActionButton > ( ) ; } subMenu . add ( sub ) ; return sub ; }
target:  Adds a sub FAB to the FloatingActionButton instance. Once pressed all its sub FAB's are displayed.