as3io / modlr

                    throw MetadataException::invalidMetadata($metadata->type, sprintf('The owned entity type "%s" is invalid based on the configured name format "%s"', $child, $this->config->getEntityFormat()));

                }

                if (false === $mf->metadataExists($child)) {

                    throw MetadataException::invalidMetadata($metadata->type, sprintf('The entity owns a type "%s" that does not exist.', $child));

                }

            }

        }

            throw MetadataException::invalidMetadata($metadata->type, 'An entity cannot extend itself.');

        }

        if (false === $mf->metadataExists($metadata->extends)) {

            throw MetadataException::invalidMetadata($metadata->type, sprintf('The parent entity type "%s" does not exist.', $metadata->extends));

        }

        $parent = $mf->getMetadataForType($metadata->extends);

        if (false === $parent->isPolymorphic()) {