removeEdgeProperty :: Key -> Id -> GS Edge
removeEdgeProperty k i = getEdgeByIdUnsafe i >>= removeEdgePropertyE k
removeEdgeProperty :: Key -> Id -> GS Edge
removeEdgeProperty k i = getEdgeByIdUnsafe i >>= removeEdgePropertyE k
removeEdgeProperty k i = getEdgeByIdUnsafe i >>= removeEdgePropertyE k