validateForProxyless

If true, indicates that the BackendServices referenced by the urlMap may be accessed by gRPC applications without using a sidecar proxy. This will enable configuration checks on urlMap and its referenced BackendServices to not allow unsupported features. A gRPC application must use "xds:///" scheme in the target URI of the service it is connecting to. If false, indicates that the BackendServices referenced by the urlMap will be accessed by gRPC applications via a sidecar proxy. In this case, a gRPC application must not use "xds:///" scheme in the target URI of the service it is connecting to