src/vs/editor/contrib/gotoSymbol/link/clickLinkGesture.ts/ClickLinkMouseEvent/constructor
class ClickLinkMouseEvent:	constructor(source: IEditorMouseEvent, opts: ClickLinkOptions) {
		this.target = source.target;
		this.hasTriggerModifier = hasModifier(source.event, opts.triggerModifier);
		this.hasSideBySideModifier = hasModifier(source.event, opts.triggerSideBySideModifier);
		this.isNoneOrSingleMouseDown = (source.event.detail <= 1);
	}