apply_filters( "delete_{$meta_type}_metadata", null|bool $delete, int $object_id, string $meta_key, mixed $meta_value, bool $delete_all )

422	 * @param string    $meta_key   Metadata key.423	 * @param mixed     $meta_value Metadata value. Must be serializable if non-scalar.424	 * @param bool      $delete_all Whether to delete the matching metadata entries425	 *                              for all objects, ignoring the specified $object_id.426	 *                              Default false.427	 */428	$check = apply_filters( "delete_{$meta_type}_metadata", null, $object_id, $meta_key, $meta_value, $delete_all );429	if ( null !== $check ) {430		return (bool) $check;431	}432 433	$_meta_value = $meta_value;434	$meta_value  = maybe_serialize( $meta_value );