def _fields_common(self):
        """Returns a dictionary of fields and values that are common to all events
        for which fields dictionaries are created.
        """
        result = {}
        if not self.testmode:
            result["__reponame__"] = self.repo.repo.full_name
            result["__repodesc__"] = self.repo.repo.description
            result["__repourl__"] = self.repo.repo.html_url
            result["__repodir__"] = self.repodir

            if self.organization is not None:
                owner = self.repo.organization
            else:
                owner = self.repo.user
                
            result["__username__"] = owner.name
            result["__userurl__"] = owner.html_url
            result["__useravatar__"] = owner.avatar_url
            result["__useremail__"] = owner.email

        return result
Returns a dictionary of fields and values that are common to all events
        for which fields dictionaries are created.