src/vs/workbench/contrib/notebook/browser/viewModel/cellOutputViewModel.ts/CellOutputViewModel/hasMultiMimeType
class CellOutputViewModel:	hasMultiMimeType() {
		if (this._outputRawData.outputs.length < 2) {
			return false;
		}

		const firstMimeType = this._outputRawData.outputs[0].mime;
		return this._outputRawData.outputs.some(output => output.mime !== firstMimeType);
	}