def getAction(self, longname):
        if longname in self.optActions:
            if callable(self.optActions[longname]):
                action = self.optActions[longname]()
            else:
                action = self.optActions[longname]
            return action._shellCode(longname, usage._ZSH)

        if longname in self.paramNameToDefinition:
            return ':%s:_files' % (longname,)
        return ''
Return a zsh "action" string for the given argument
dataset/ETHPy150Open nlloyd/SubliminalCollaborator/libs/twisted/python/_shellcomp.py/ZshArgumentsGenerator.getAction