public void add ( TYPE_1 element ) { if ( ( this . VAR_1 ) != null ) { this . VAR_1 . add ( element ) ; } else { throw new TYPE_2 ( STRING_1 ) ; } } 

public TYPE_1 add ( TYPE_1 element ) { if ( ( this . VAR_1 ) != null ) { this . VAR_1 . add ( element ) ; return element ; } else { throw new TYPE_2 ( STRING_1 ) ; } } 
