Parents

        :param parent: Parent to set for the object
        :type parent: Collection
        :return:

def parent(self, parent):
        """ Parents

        :param parent: Parent to set for the object
        :type parent: Collection
        :return:
        """
        self._parent = parent
        self.graph.add(
            (self.asNode(), RDF_NAMESPACES.CAPITAINS.parent, parent.asNode())
        )
        parent._add_member(self)