如何以编程方式打开Safari Extension ToolbarItem popover

I want to programmatically trigger a 'click' event on my Safari Extension toolbarItem so that my custom popover appears after something happens on the webpage. I'm using the new Xcode extension IDE and have built my popover using interface builder. All of the answers on StackOverflow currently deal with extensions built in the Safari extension builder and not in the Xcode interface. For example, I have tried injected Safari JS solutions like: I want to programmatically trigger a 'click' ev