src/vs/workbench/services/themes/common/colorThemeData.ts/ColorThemeData/semanticHighlighting
class ColorThemeData:	get semanticHighlighting(): boolean {
		if (this.customSemanticHighlighting !== undefined) {
			return this.customSemanticHighlighting;
		}
		if (this.customSemanticHighlightingDeprecated !== undefined) {
			return this.customSemanticHighlightingDeprecated;
		}
		return !!this.themeSemanticHighlighting;
	}