[ ] add to_multilinestring for geometrycollections
[ ] test
The motivation here is that a lot of geometry correction/validation functions can return GeometryCollections of e.g. polygons and points or lines. This makes it almost mindless to apply to_multipoly.
TODO:
The motivation here is that a lot of geometry correction/validation functions can return GeometryCollections of e.g. polygons and points or lines. This makes it almost mindless to apply to_multipoly.