Controls how duplicate edges (i.e., edges that are present multiple
times) are handled. Such edges may be present in the input, or they can
be created when vertices are snapped together. When several edges are
merged, the result is a single edge labelled with all of the original
input edge ids.
Controls how duplicate edges (i.e., edges that are present multiple times) are handled. Such edges may be present in the input, or they can be created when vertices are snapped together. When several edges are merged, the result is a single edge labelled with all of the original input edge ids.