How to use the inql.actions.setcustomheader.CustomHeaderSetterAction function in inql

mkdir_p(args.output_directory)
    os.chdir(args.output_directory)

    if platform.system() == "Java" and args.nogui is not True:
        from inql.widgets.tab import GraphQLPanel
        from inql.actions.sendto import SimpleMenuItem, EnhancedHTTPMutator, GraphiQLSenderAction
        from inql.actions.setcustomheader import CustomHeaderSetterAction
        overrideheaders = {}
        graphiql_omnimenu = SimpleMenuItem(text="Send to GraphiQL")
        http_mutator = EnhancedHTTPMutator(
            requests=args.requests,
            stub_responses=args.stub_responses,
            overrideheaders=overrideheaders)
        graphiql_sender = GraphiQLSenderAction(omnimenu=graphiql_omnimenu, http_mutator=http_mutator)
        custom_header_setter = CustomHeaderSetterAction(overrideheaders=overrideheaders, text="Set Custom Header")
        cfg = [
            ['Proxy', args.proxy],
            ['Authorization Key', args.key],
            ['Load Placeholders', args.detect],
            ['Generate HTML DOC', args.generate_html],
            ['Generate Schema DOC', args.generate_schema],
            ['Generate Stub Queries', args.generate_queries],
            ['Accept Invalid SSL Certificate', args.insecure_certificate]
        ]
        return GraphQLPanel(
            actions=[custom_header_setter, graphiql_sender],
            restore=json.dumps({'config': cfg}),
            http_mutator=None,
            requests=args.requests,
            stub_responses=args.stub_responses
        ).app()

def getUiComponent(self):
        """
        Override ITab method
        :return: Tab UI Component
        """
        overrideheaders = {}
        repeater_omnimenu = OmniMenuItem(callbacks=self._callbacks, helpers=self._helpers, text="Send to Repeater")
        graphiql_omnimenu = OmniMenuItem(callbacks=self._callbacks, helpers=self._helpers, text="Send to GraphiQL")
        http_mutator = EnhancedHTTPMutator(
            callbacks=self._callbacks, helpers=self._helpers, overrideheaders=overrideheaders)
        repeater_sender = RepeaterSenderAction(omnimenu=repeater_omnimenu, http_mutator=http_mutator)
        graphiql_sender = GraphiQLSenderAction(omnimenu=graphiql_omnimenu, http_mutator=http_mutator)
        custom_header_setter = CustomHeaderSetterAction(overrideheaders=overrideheaders, text="Set Custom Header")
        try:
            restore = self._callbacks.loadExtensionSetting(GraphQLPanel.__name__)
        except Exception as ex:
            print("Cannot restore state! %s" % ex)
            restore = None

        proxy = None

        for request_listener in json.loads(self._callbacks.saveConfigAsJson())["proxy"]["request_listeners"]:
            if request_listener["running"]:
                proxy = "localhost:%s" % request_listener["listener_port"]
                break

        self.panel = GraphQLPanel(
            actions=[
                repeater_sender,