apply_filters( 'register_meta_args', array $args, array $defaults, string $object_type, string $meta_key )

1479	 * @param array  $args        Array of meta registration arguments.1480	 * @param array  $defaults    Array of default arguments.1481	 * @param string $object_type Type of object metadata is for. Accepts 'blog', 'post', 'comment', 'term',1482	 *                            'user', or any other object type with an associated meta table.1483	 * @param string $meta_key    Meta key.1484	 */1485	$args = apply_filters( 'register_meta_args', $args, $defaults, $object_type, $meta_key );1486	unset( $defaults['default'] );1487	$args = wp_parse_args( $args, $defaults );1488 1489	// Require an item schema when registering array meta.1490	if ( false !== $args['show_in_rest'] && 'array' === $args['type'] ) {1491		if ( ! is_array( $args['show_in_rest'] ) || ! isset( $args['show_in_rest']['schema']['items'] ) ) {