src/vs/workbench/contrib/notebook/browser/viewModel/baseCellViewModel.ts/BaseCellViewModel/mime
class BaseCellViewModel:	get mime(): string {
		if (typeof this.model.mime === 'string') {
			return this.model.mime;
		}

		switch (this.language) {
			case 'markdown':
				return Mimes.markdown;

			default:
				return Mimes.text;
		}
	}