src/vs/workbench/contrib/notebook/common/notebookOptions.ts/NotebookOptions/_computeOutputLineHeight
class NotebookOptions:	private _computeOutputLineHeight(): number {
		const minimumLineHeight = 8;
		let lineHeight = this.configurationService.getValue<number>(NotebookSetting.outputLineHeight);

		if (lineHeight < minimumLineHeight) {
			// Values too small to be line heights in pixels are in ems.
			let fontSize = this.configurationService.getValue<number>(NotebookSetting.outputFontSize);
			if (fontSize === 0) {
				fontSize = this.configurationService.getValue<number>('editor.fontSize');
			}

			lineHeight = lineHeight * fontSize;
		}

		// Enforce integer, minimum constraints
		lineHeight = Math.round(lineHeight);
		if (lineHeight < minimumLineHeight) {
			lineHeight = minimumLineHeight;
		}

		return lineHeight;
	}