src/vs/workbench/contrib/codeEditor/browser/toggleMultiCursorModifier.ts/MultiCursorModifierContextKeyController/_update
class MultiCursorModifierContextKeyController:	private _update(): void {
		const editorConf = this.configurationService.getValue<{ multiCursorModifier: 'ctrlCmd' | 'alt' }>('editor');
		const value = (editorConf.multiCursorModifier === 'ctrlCmd' ? 'ctrlCmd' : 'altKey');
		this._multiCursorModifier.set(value);
	}