def load_relationship(name)
      populate_relationship(:parent, interface.parent)
      populate_relationship(:machine, interface.machine)
      populate_relationship(:children, interface.children)
    end
def load_relationship(name)
      populate_relationship(:parent, interface.parent)
      populate_relationship(:machine, interface.machine)
      populate_relationship(:children, interface.children)
    end
Loads the lazy relationships.

 **This method should only be called internally.**