Returns the absolute paths to "template_name", when appended to each
        directory in "template_dirs". Any paths that don't lie inside one of the
        template dirs are excluded from the result set, for security reasons.

def get_template_sources(template_name, template_dirs=None):
        """
        Returns the absolute paths to "template_name", when appended to each
        directory in "template_dirs". Any paths that don't lie inside one of the
        template dirs are excluded from the result set, for security reasons.
        """
        if not connection.tenant or isinstance(connection.tenant, FakeTenant):
            return
        if not template_dirs:
            try:
                template_dirs = settings.MULTITENANT_TEMPLATE_DIRS
            except AttributeError:
                raise ImproperlyConfigured('To use %s.%s you must define the MULTITENANT_TEMPLATE_DIRS' %
                                           (__name__, FilesystemLoader.__name__))
        for template_dir in template_dirs:
            try:
                if '%s' in template_dir:
                    yield safe_join(template_dir % connection.tenant.domain_url, template_name)
                else:
                    yield safe_join(template_dir, connection.tenant.domain_url, template_name)
            except UnicodeDecodeError:
                # The template dir name was a bytestring that wasn't valid UTF-8.
                raise
            except ValueError:
                # The joined path was located outside of this particular
                # template_dir (it might be inside another one, so this isn't
                # fatal).
                pass