src/vs/workbench/contrib/scm/browser/dirtydiffDecorator.ts/DirtyDiffModel/getOriginalResource
class DirtyDiffModel:	private async getOriginalResource(): Promise<URI | null> {
		if (this._disposed) {
			return Promise.resolve(null);
		}

		const uri = this._model.resource;
		return getOriginalResource(this.scmService, uri);
	}