apply_filters( 'populate_network_meta', array $sitemeta, int $network_id )

1293	 *1294	 * @since 3.7.01295	 *1296	 * @param array $sitemeta   Associative array of network meta keys and values to be inserted.1297	 * @param int   $network_id ID of network to populate.1298	 */1299	$sitemeta = apply_filters( 'populate_network_meta', $sitemeta, $network_id );1300 1301	$insert = '';1302	foreach ( $sitemeta as $meta_key => $meta_value ) {1303		if ( is_array( $meta_value ) ) {1304			$meta_value = serialize( $meta_value );1305		}