src/vs/editor/standalone/browser/standaloneThemeService.ts/StandaloneThemeService/_registerRegularEditorContainer
class StandaloneThemeService:	private _registerRegularEditorContainer(): IDisposable {
		if (!this._globalStyleElement) {
			this._globalStyleElement = dom.createStyleSheet();
			this._globalStyleElement.className = 'monaco-colors';
			this._globalStyleElement.textContent = this._allCSS;
			this._styleElements.push(this._globalStyleElement);
		}
		return Disposable.None;
	}