public TYPE_1 METHOD_1 ( ) { return new TYPE_1 ( new TYPE_2 ( start ) , new TYPE_2 ( end ) ) ; } 

public TYPE_1 METHOD_1 ( ) { return new TYPE_1 ( ( ( start ) != null ? new TYPE_2 ( start ) : null ) , ( ( end ) != null ? new TYPE_2 ( end ) : null ) ) ; } 
