src/vs/workbench/api/common/extHostTypes.ts/DataTransfer/forEach
class DataTransfer:	forEach(callbackfn: (value: DataTransferItem, key: string, dataTransfer: DataTransfer) => void, thisArg?: unknown): void {
		for (const [mime, items] of this.#items) {
			for (const item of items) {
				callbackfn.call(thisArg, item, mime, this);
			}
		}
	}