How to call a graphql registered resolver from another one

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1
System Information
  • Strapi Version: 4.3.2
  • Operating System:
  • Database:
  • Node Version:
  • NPM Version:
  • Yarn Version:

I want to extend the graphql resolver of removeFile mutation (which comes from the upload core plugin).

I have successfully replaced the resolver using the following code on my plugin’s register.js file, but I haven’t yet find a way to call the original resolver of removeFile inside my custom one

export default ({ strapi }) => {
  const extensionService = strapi.plugin("graphql").service("extension");

  extensionService.use(({ nexus }) => ({
    resolvers: {
      Mutation: {
        removeFile: async (obj, args) => {
          // my custom logic will goes here
          

          // !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
          // I WANT TO CALL the original resolver of "removeFile" here
          // !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!


          // other logic will also goes here
        },
      },
    },
  }));
};

So my question is: How can I call a graphql registered resolver (the original resolver of removeFile mutation) from another one (the new registered resolver)?

Additional Info: note that I have successfully replaced a controller handler by assign a new function to it and call the old one in some point of time. here is the code

export default ({ strapi }) => {
  strapi.container
    .get("controllers")
    .extend("plugin::upload.admin-file", (controller) => {
      const originalHandler = controller["destroy"].bind(controller);

      controller["destroy"] = async function (ctx) {
        // my custom logic will goes here

        await originalHandler();

        // other logic will also goes here
      };

      return controller;
    });
};
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