How can I get checkBox text from Swing app

I need help please. I'm working on a test automation project with Ruby and Selenide on an application developed with Swing. I have no access to the source code of the Swing application. I would like to retrieve the text that is in front of the checkbox but I have not succeeded. I get the data tree and save it in a variable called "tree" like this "tree = FindElements.findElementsByCss('tree::all-nodes')", I loop through this "tree", and I can only get the value of the checkbox box which is either false or true. I would like to check if the text "Terzo Interessato" exists in "tree" or not. How could I do?! Thank you very much.enter image description here