def is_registered(self, cuuid, host):
<EOL>if (cuuid in self.registry) and (self.registry[cuuid]["<STR_LIT:host>"] == host):<EOL><INDENT>return True<EOL><DEDENT>else:<EOL><INDENT>return False<EOL><DEDENT>
This function will check to see if a given host with client uuid is
        currently registered.

        Args:
          cuuid (string): The client uuid that wishes to register.
          host (tuple): The (address, port) tuple of the client that is
            registering.

        Returns:
          Will return True if the client is registered and will return False if
          it is not.