Navigation to method

Hello, I want to make a plugin that allow add a method of class to the list (like bookmark). This plugin also have a toolWindow to manage list functon (like bookmark toolWindow).

So I have 2 questions:

1. How can I storage function (xml contains path of class file and line of method or anything)

2. What method I can use to navigation to method when I click a item of the list in toolWindow.