src/vs/editor/common/config/fontInfo.ts/BareFontInfo/constructor
class BareFontInfo:	protected constructor(opts: {
		pixelRatio: number;
		fontFamily: string;
		fontWeight: string;
		fontSize: number;
		fontFeatureSettings: string;
		lineHeight: number;
		letterSpacing: number;
	}) {
		this.pixelRatio = opts.pixelRatio;
		this.fontFamily = String(opts.fontFamily);
		this.fontWeight = String(opts.fontWeight);
		this.fontSize = opts.fontSize;
		this.fontFeatureSettings = opts.fontFeatureSettings;
		this.lineHeight = opts.lineHeight | 0;
		this.letterSpacing = opts.letterSpacing;
	}