Source

File: wp-admin/includes/ms.php

function can_edit_network( $network_id ) {
	if ( get_current_network_id() == $network_id ) {
		$result = true;
	} else {
		$result = false;
	}

	/**
	 * Filters whether this network can be edited from this page.
	 *
	 * @since 3.1.0
	 *
	 * @param bool $result     Whether the network can be edited from this page.
	 * @param int  $network_id The network ID to check.
	 */
	return apply_filters( 'can_edit_network', $result, $network_id );
}