public boolean isEmpty ( ) { TYPE_1 < TYPE_2 > p = VAR_1 ; <BUG> if ( p != null ) {return VAR_2 . isEmpty ( this ) ;}return true ;</BUG> }
public boolean isEmpty ( ) { TYPE_1 < TYPE_2 > p = VAR_1 ; return ( p == null ) || ( VAR_2 . isEmpty ( this ) ) ; } 
