csob-bank-extend-blocked-statuses.php

<?php
//Defined
$statuses = array(
   'completed',
   'failed',
   'cancelled',
   'refunded'
);

apply_filters( 'csob_bank_blocked_order_statuses', $statuses );

//Snippet
add_filter( 'csob_bank_blocked_order_statuses', 'extend_csob_blocked_statuses' );
function extend_csob_blocked_statuses( $statuses ){
  $statuses[] = 'nezaplaceno';
  return $statuses;
}