public synchronized void METHOD_1 ( TYPE_1 target ) { if ( ( VAR_1 ) == null ) { throw new TYPE_2 ( STRING_1 ) ; } VAR_1 . remove ( target ) ; } 

public synchronized void METHOD_1 ( TYPE_1 target ) { if ( target == null ) { throw new TYPE_2 ( STRING_1 ) ; } VAR_1 . remove ( target ) ; } 
