Return the currently selected releasetype

        :returns: the selected releasetype
        :rtype: str
        :raises: None

def get_releasetype(self, ):
        """Return the currently selected releasetype

        :returns: the selected releasetype
        :rtype: str
        :raises: None
        """
        for rt, rb in self._releasetype_button_mapping.items():
            if rb.isChecked():
                return rt