[api-extractor] rollup .d.ts include not declare module

[Senasiko]

Is this a feature or a bug?

• Feature
• Bug

Please describe the actual behavior.
I have an index.d.ts what include declare module

// index.d.ts
export const test: string;

declare module 'my-module' {
  export const name = 'my-module';
}

And run api-extractor run

// api-extractor.json
{
  "mainEntryPointFilePath": "./index.d.ts",

  "apiReport": {
    "enabled": true,
    "reportFolder": "<projectFolder>/temp/"
  },

  "docModel": {
    "enabled": true
  },

  "dtsRollup": {
    "enabled": true,
    "untrimmedFilePath": "./result.d.ts"
  },

  "tsdocMetadata": {
    "enabled": false
  }

}

the result is

export declare const test: string;

export { }

result is include not declare module
What is the expected behavior?

// result.d.ts
export declare const test: string;

declare module 'my-module' {
  export const name = 'my-module';
}

I think it's useful to include declare module for some plugin module what override something. For example.

// my-module
export interface CustomOptions {}
export interface Options extends CustomOptions {
    name: string;
}

// my-module-plugin
declare module 'my-module' {
    export interface CustomOptions {
        otherInfo: string;
    }
}

[posva]

Are you aware of any workaround to include the declare module part? @octogonz
In case I can avoid to append the declare module code by hand 😄

[idranme]

I'm having this problem too.

[hanfengv]

package.json
"types": "./dist/index.d.ts",