_startShowingOrUpdateHover(anchor, mode, source, focus, mouseEvent) {
        if (!this._widget.position || !this._currentResult) {
            // The hover is not visible
            if (anchor) {
                this._startHoverOperationIfNecessary(anchor, mode, source, focus, false);
                return true;
            }
            return false;
        }
        // The hover is currently visible
        const isHoverSticky = this._editor.getOption(60 /* EditorOption.hover */).sticky;
        const isGettingCloser = (isHoverSticky
            && mouseEvent
            && this._widget.isMouseGettingCloser(mouseEvent.event.posx, mouseEvent.event.posy));
        if (isGettingCloser) {
            // The mouse is getting closer to the hover, so we will keep the hover untouched
            // But we will kick off a hover update at the new anchor, insisting on keeping the hover visible.
            if (anchor) {
                this._startHoverOperationIfNecessary(anchor, mode, source, focus, true);
            }
            return true;
        }
        if (!anchor) {
            this._setCurrentResult(null);
            return false;
        }
        if (anchor && this._currentResult.anchor.equals(anchor)) {
            // The widget is currently showing results for the exact same anchor, so no update is needed
            return true;
        }
        if (!anchor.canAdoptVisibleHover(this._currentResult.anchor, this._widget.position)) {
            // The new anchor is not compatible with the previous anchor
            this._setCurrentResult(null);
            this._startHoverOperationIfNecessary(anchor, mode, source, focus, false);
            return true;
        }
        // We aren't getting any closer to the hover, so we will filter existing results
        // and keep those which also apply to the new anchor.
        this._setCurrentResult(this._currentResult.filter(anchor));
        this._startHoverOperationIfNecessary(anchor, mode, source, focus, false);
        return true;
    }
Returns true if the hover shows now or will show.