trigger_error('<span class="debug_error">no filters defined</span> for prefix <b>'.$this->Prefix.'</b>, but <b>DrawFilterMenu</b> tag used', E_USER_WARNING);
if (method_exists($object, 'EOL') && count($object->Records) == 0) {
// for drawing grid column filter
$block_params['field_name'] = '';
}
else {
$block_params['field_name'] = $this->InputName($params); // depricated (produces warning when used as grid filter), but used in Front-End (submission create), admin (submission view)