.. hook:: H_MOVE_OBJECT0
  H_MOVE_OBJECT1

  :arg closure value: void <closure>(object item, object dest)

  Mandatory hooks to implement the efun void :efun:`move_object`. Hook setting must be an unbound lambda closure.

  Upon call, the hook has to perform the move itself (by using :efun:`set_environment`) and all depending actions (like the calls to :applied:`init` to add actions).

  The difference lies in the binding of the set hook prior to the call: the H_MOVE_OBJECT0 closure is bound to the current object, the H_MOVE_OBJECT1 to 'item'.

  If both hooks are set, H_MOVE_OBJECT0 is ignored.

  .. history

  .. seealso:: :efun:`move_object`, :efun:`set_environment`, :overview:`hook`