private PassageCallback _Remove(Action <T> value)
{
GhostPassage <T> passage = new GhostPassage <T>(value);
passage.ThroughEvent += (gpi) => _Gpis.Remove(gpi);
_UnsupplyPassages.Add(passage);
return(passage.Through);
}
private PassageCallback _Add(Action <T> value)
{
GhostPassage <T> passage = new GhostPassage <T>(value);
passage.ThroughEvent += _Gpis.Add;
_SupplyPassages.Add(passage);
return(passage.Through);
}
