findSameRelation method
Implementation
ModelRelation? findSameRelation(ModelRelation other) => other.id.uid == 0
    ? _findRelationByName(other.name)
    : _findRelationByUid(other.id.uid);ModelRelation? findSameRelation(ModelRelation other) => other.id.uid == 0
    ? _findRelationByName(other.name)
    : _findRelationByUid(other.id.uid);