code: function(ctx) {
  		// TODO: return promise?
  		if( ctx.targetType === "title" && ctx.options.clickFolderMode === 4) {
  //			this.nodeSetFocus(ctx);
  //			this._callHook("nodeSetActive", ctx, true);
  			this._callHook("nodeToggleExpanded", ctx);
  		}
  		// TODO: prevent text selection on dblclicks
  		if( ctx.targetType === "title" ) {
  			ctx.originalEvent.preventDefault();
  		}
  	}
docs: Default handling for mouse douleclick events.
  @param {EventData} ctx