Add default headers for every request in generated api (typescript-fetch)

Code-gen language: typescript-fetch

In Configuration I can only set the following attributes:

export interface ConfigurationParameters {
    apiKey?: string | ((name: string) => string);
    username?: string;
    password?: string;
    accessToken?: string | ((name: string, scopes?: string[]) => string);
    basePath?: string;
}

But adding a set of default headers would be nice, currently I have to add this always when calling the api operation:

let requestHeaders: any = { 
      'Accept': 'application/json',
      'Content-Type': 'application/json'
};

myApi.myOperation(myParam1, myParam2, requestHeaders)
    .then(...);

I saw that there were some investigations in Go language but not in typescript-fetch.

With the current situation I have to wrap each operation in a separate service api class, which is not so nice (especially to maintain these operations etc.)

Is there a way?

Start by locating the typescript-fetch Configuration definition and the generated operation request path. Add a configurable set of default headers that applies to every generated request, then verify that callers no longer need to pass the same headers to each operation.