src/vs/editor/contrib/hover/modesContentHover.ts/ModesContentComputer/getResultWithLoadingMessage
class ModesContentComputer:	public getResultWithLoadingMessage(): IHoverPart[] {
		if (this._anchor) {
			for (const participant of this._participants) {
				if (participant.createLoadingMessage) {
					const loadingMessage = participant.createLoadingMessage(this._anchor);
					if (loadingMessage) {
						return this._result.slice(0).concat([loadingMessage]);
					}
				}
			}
		}
		return this._result.slice(0);
	}