src/vs/workbench/browser/parts/views/treeView.ts/CustomTreeViewDragAndDrop/convertKnownMimes
class CustomTreeViewDragAndDrop:	private convertKnownMimes(type: string, value?: string | FileSystemHandle): { type: string; value?: string } {
		let convertedValue = undefined;
		let convertedType = type;
		switch (type) {
			case DataTransfers.RESOURCES.toLowerCase(): {
				convertedValue = value ? convertResourceUrlsToUriList(value as string) : undefined;
				convertedType = Mimes.uriList;
				break;
			}
			case 'Files': {
				convertedType = Mimes.uriList;
				convertedValue = value ? (value as FileSystemHandle).name : undefined;
				break;
			}
		}
		return { type: convertedType, value: convertedValue };
	}