Session pool configuration options. {boolean} [routeToLeaderEnabled=True] If set to false leader aware routing will be disabled. Disabling leader aware routing would route all requests in RW/PDML transactions to any region. {google.spanner.v1.IDirectedReadOptions} [directedReadOptions] Sets the DirectedReadOptions for all ReadRequests and ExecuteSqlRequests for the Client. Indicates which replicas or regions should be used for non-transactional reads or queries. DirectedReadOptions won't be set for readWrite transactions"