'Return a tick with the specified order id.
:param order_id: The order id to search for
:type order_id: OrderId
:rtype: TickEntry'

def get_tick(self, order_id):

    assert isinstance(order_id, OrderId), type(order_id)
    return (self._bids.get_tick(order_id) or self._asks.get_tick(order_id))
