src/vs/workbench/services/themes/common/colorThemeData.ts/ColorThemeData/setCustomTokenColors
class ColorThemeData:	public setCustomTokenColors(customTokenColors: ITokenColorCustomizations) {
		this.customTokenColors = [];
		this.customSemanticHighlightingDeprecated = undefined;

		// first add the non-theme specific settings
		this.addCustomTokenColors(customTokenColors);

		// append theme specific settings. Last rules will win.
		const themeSpecificTokenColors = customTokenColors[`[${this.settingsId}]`] as ITokenColorCustomizations;
		if (types.isObject(themeSpecificTokenColors)) {
			this.addCustomTokenColors(themeSpecificTokenColors);
		}

		this.tokenColorIndex = undefined;
		this.textMateThemingRules = undefined;
		this.customTokenScopeMatchers = undefined;
	}