src/vs/workbench/services/textMate/common/TMHelper.ts/ThemeRule/constructor
class ThemeRule:	constructor(rawSelector: string, settings: ITokenColorizationSetting) {
		this.rawSelector = rawSelector;
		this.settings = settings;
		const rawSelectorPieces = this.rawSelector.split(/ /);
		this.scope = rawSelectorPieces[rawSelectorPieces.length - 1];
		this.parentScopes = rawSelectorPieces.slice(0, rawSelectorPieces.length - 1);
	}