}
$old_array = array_keys($this->getDependentOn());
+ if (!is_array($depend_arr)) {
+ $depend_arr = array();
+ }
$removed=array_diff($old_array,array_keys($depend_arr));
$added=array_diff(array_keys($depend_arr), $old_array);
if (count($removed)>0 || count($added)>0) {