How do I override treemacs-RET-action to run my custom command?

User Support
, ,
#1

When I press the RET key or double click with mouse, I want to run a command instead of what it does now.

I tried this:

(after! treemacs
  (define-key evil-treemacs-state-map (kbd "RET") #'custom/treemacs-open-file))

While in tremacs and I do M-x, I can even see that RET is linked to my custom command, but it still does not run my custom command.