extracts the polygon elements from a single geometry and adds them to the provided list . concode_field_sep List comps concode_field_sep void filter
List function ( Geometry arg0 , List arg1 ) { if ( arg0 instanceof Polygon ) { arg1 . add ( arg0 ) ; } else if ( arg0 instanceof GeometryCollection ) { arg0 . apply ( new PolygonExtracter ( arg1 ) ) ; } return arg1 ; }