For layers that will be assembled into polygons, this method specifies a
predicate that will be called to determine whether the polygon is empty
or full except for the given degeneracies. (See IsFullPolygonPredicate
above.)
This method should be called at most once per layer; additional calls
simply overwrite the previous value for the current layer.
The default implementation sets an appropriate error and returns false
(i.e., degenerate polygons are assumed to be empty).
For layers that will be assembled into polygons, this method specifies a predicate that will be called to determine whether the polygon is empty or full except for the given degeneracies. (See IsFullPolygonPredicate above.)
This method should be called at most once per layer; additional calls simply overwrite the previous value for the current layer.
The default implementation sets an appropriate error and returns false (i.e., degenerate polygons are assumed to be empty).