src/vs/platform/workspaces/electron-main/workspacesHistoryMainService.ts/WorkspacesHistoryMainService/indexOfFile
class WorkspacesHistoryMainService:	private indexOfFile(recents: IRecentFile[], candidate: URI): number {
		return recents.findIndex(recent => extUriBiasedIgnorePathCase.isEqual(recent.fileUri, candidate));
	}