src/vs/workbench/services/themes/common/colorThemeData.ts/ColorThemeData/getTokenStylingRuleScope
class ColorThemeData:	public getTokenStylingRuleScope(rule: SemanticTokenRule): 'setting' | 'theme' | undefined {
		if (this.customSemanticTokenRules.indexOf(rule) !== -1) {
			return 'setting';
		}
		if (this.semanticTokenRules.indexOf(rule) !== -1) {
			return 'theme';
		}
		return undefined;
	}