'Specific method to detach a disk from a node
:param      node: Node which should be used
:type       node: :class:`Node`
:param      disk: Disk which should be used
:type       disk: :class:`GandiDisk`
:rtype: ``bool``'

def ex_node_detach_disk(self, node, disk):

    op = self.connection.request('hosting.vm.disk_detach', int(node.id), int(disk.id))
    if self._wait_operation(op.object['id']):
        return True
    return False
