Instantiation

Instantiation edges are NOT used in a normal GroIMP graph. By design, instantiation rules are not added to the graph. Thus, do not use edges. The instantiation edges are used in the context of an imported data. It keep the knowledge that an imported edge was created at export from an instantiation rule. the bit mask is 131072.

A better implementation of this behavior would actually NOT used instantiation edge (which should not exists). But instead, declare the instantiation of the node imported based on the graph read.

Representation: