Bug report

In webpack's declarations.d.ts, Source is

export abstract class Source {
		size(): number;

		map(options?: MapOptions): Object;

while in @types/webpack-sources, it is

    map(options?: MapOptions): RawSourceMap | null;

What is the expected behavior?
typing of webpack and webpack-sources should be compatible.

In this case I believe the latter is more detailed, so it should be used. BTW, why doesn't webpack use this declaration but instead write its own?

Other relevant information:
webpack version: 5.11.1