A few plugins have this functionality. For example, SublimeCodeIntel, SublimeRope, and SublimeClang have "go to definition." What nick. is referring to is the "Go To Symbol" panel which displays a list of all the methods in the current file. You can get to this panel by pressing @ in the Go To Anything panel (control+p). This also works for any file in the current project. filename#function_name. I'm assuming you're referring to highlighting a method and pressing some keystroke to take you the the declaration of said function.