if (target.isEnabled()) {
target.incEnabledInDegree();
node.incEnabledOutDegree();
view.incEdgesCountEnabled(1);
if (target.getEdgesOutTree().hasNeighbour(node) && target.getId() < node.getId()) {
target.incEnabledMutualDegree();
node.incEnabledMutualDegree();
view.incMutualEdgesEnabled(1);
}
}
}