src/vs/workbench/api/browser/mainThreadTreeViews.ts/TreeViewDragAndDropController/handleDrop
class TreeViewDragAndDropController:	async handleDrop(dataTransfer: IDataTransfer, targetTreeItem: ITreeItem | undefined, token: CancellationToken,
		operationUuid?: string, sourceTreeId?: string, sourceTreeItemHandles?: string[]): Promise<void> {
		return this._proxy.$handleDrop(this.treeViewId, await DataTransferConverter.toDataTransferDTO(dataTransfer), targetTreeItem?.handle, token, operationUuid, sourceTreeId, sourceTreeItemHandles);
	}