_updateHotspots() {
			if (this.#bUpdateHotspotsPending) {
				return;
			}
			this.#bUpdateHotspotsPending = true;

			// gather and send field help info in task so that e.g. field help can be displayed at a column header
			setTimeout(() => {
				if (this.isActive()) {
					this.#fnUpdateHotspotsCallback(this._getFieldHelpHotspots());
					this.#mMetaModel2TextMappingPromise.clear();
				}
				this.#bUpdateHotspotsPending = false;
			}, 0);
		}
Calls the <code>fnUpdateHotspotsCallback</code> as given in {@link #activate} asynchronously with the latest
field help hotspots.