Allow ICell to remove parent

ogallagher / fxgraph

A JavaFX graph editor

Do What The F*ck You Want To Public License

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Allow ICell to remove parent #2

Open ogallagher opened 2 years ago

ogallagher commented 2 years ago

The fxgraph.graph.ICell interface can add and remove child cells, but only add parents. I think removal of parents makes sense as well, if they can be added.