src/vs/workbench/services/workingCopy/common/storedFileWorkingCopyManager.ts/StoredFileWorkingCopyManager/joinPendingResolves
class StoredFileWorkingCopyManager:	private joinPendingResolves(resource: URI): Promise<void> | undefined {
		const pendingWorkingCopyResolve = this.mapResourceToPendingWorkingCopyResolve.get(resource);
		if (!pendingWorkingCopyResolve) {
			return;
		}

		return this.doJoinPendingResolves(resource);
	}