src/vs/workbench/contrib/notebook/browser/notebookEditorWidget.ts/NotebookEditorWidget/didDropMarkupCell
class NotebookEditorWidget:	didDropMarkupCell(cellId: string, event: { dragOffsetY: number, ctrlKey: boolean, altKey: boolean; }): void {
		const cell = this.getCellById(cellId);
		if (cell instanceof MarkupCellViewModel) {
			this._dndController?.explicitDrop(cell, event);
		}
	}