def __init__(self,<EOL>transport=None,<EOL>channel=None,<EOL>credentials=None,<EOL>client_config=contexts_client_config.config,<EOL>client_info=None):
<EOL>if client_config:<EOL><INDENT>warnings.warn('<STR_LIT>',<EOL>PendingDeprecationWarning)<EOL><DEDENT>if channel:<EOL><INDENT>warnings.warn(<EOL>'<STR_LIT>'<EOL>'<STR_LIT>', PendingDeprecationWarning)<EOL><DEDENT>if transport:<EOL><INDENT>if callable(transport):<EOL><INDENT>self.transport = transport(<EOL>credentials=credentials,<EOL>default_class=contexts_grpc_transport.<EOL>ContextsGrpcTransport,<EOL>)<EOL><DEDENT>else:<EOL><INDENT>if credentials:<EOL><INDENT>raise ValueError(<EOL>'<STR_LIT>'<EOL>'<STR_LIT>')<EOL><DEDENT>self.transport = transport<EOL><DEDENT><DEDENT>else:<EOL><INDENT>self.transport = contexts_grpc_transport.ContextsGrpcTransport(<EOL>address=self.SERVICE_ADDRESS,<EOL>channel=channel,<EOL>credentials=credentials,<EOL>)<EOL><DEDENT>if client_info is None:<EOL><INDENT>client_info = (<EOL>google.api_core.gapic_v1.client_info.DEFAULT_CLIENT_INFO)<EOL><DEDENT>client_info.gapic_version = _GAPIC_LIBRARY_VERSION<EOL>self._client_info = client_info<EOL>self._method_configs = google.api_core.gapic_v1.config.parse_method_configs(<EOL>client_config['<STR_LIT>'][self._INTERFACE_NAME], )<EOL>self._inner_api_calls = {}<EOL>
Constructor.

        Args:
            transport (Union[~.ContextsGrpcTransport,
                    Callable[[~.Credentials, type], ~.ContextsGrpcTransport]): A transport
                instance, responsible for actually making the API calls.
                The default transport uses the gRPC protocol.
                This argument may also be a callable which returns a
                transport instance. Callables will be sent the credentials
                as the first argument and the default transport class as
                the second argument.
            channel (grpc.Channel): DEPRECATED. A ``Channel`` instance
                through which to make calls. This argument is mutually exclusive
                with ``credentials``; providing both will raise an exception.
            credentials (google.auth.credentials.Credentials): The
                authorization credentials to attach to requests. These
                credentials identify this application to the service. If none
                are specified, the client will attempt to ascertain the
                credentials from the environment.
                This argument is mutually exclusive with providing a
                transport instance to ``transport``; doing so will raise
                an exception.
            client_config (dict): DEPRECATED. A dictionary of call options for
                each method. If not specified, the default configuration is used.
            client_info (google.api_core.gapic_v1.client_info.ClientInfo):
                The client info used to send a user-agent string along with
                API requests. If ``None``, then default info will be used.
                Generally, you only need to set this if you're developing
                your own client library.