[Libguestfs] Conditional statements in libguestfs

Hi Experts, I am writing a guestfish script . I want to implement conditional logic inside guestfish script. For example , if state.tgz exists in image do something else if onetime.tgz exists in the image do someotherthing . Is it possible to do this within guestfish script. I tried to search a solution for this in guestfish doucmentation but couldn't find anything useful. Thanks in advance for your help.