def delete_record(self, identifier=None, rtype=None, name=None, content=None, **kwargs):
        """
        Delete an existing record.
        If record does not exist, do nothing.
        If an identifier is specified, use it, otherwise do a lookup using type, name and content.
        """
        if not rtype and kwargs.get('type'):
            warnings.warn('Parameter "type" is deprecated, use "rtype" instead.',
                          DeprecationWarning)
            rtype = kwargs.get('type')

        return self._delete_record(identifier=identifier, rtype=rtype, name=name, content=content)
Delete an existing record.
        If record does not exist, do nothing.
        If an identifier is specified, use it, otherwise do a lookup using type, name and content.