How to call exist action

i wanna make a new "navigate test" plugin for idea since "navigate test" for java and python always pop up "create new test" dialog, but in ruby case, old "navigate test" work well. so i wanna enable my plugin only in java and python case, and in ruby case, invoke old one.

so my question is:
how to invoke exist action in idea

addtional question:
is there a good document for openapi? i navigate openapi source with idea, there are only source code, not doc.