/**
  * @return string
  */
 function layout_form_loop()
 {
     $html = '';
     foreach ($this->_form_section->subsections() as $name => $subsection) {
         if ($subsection instanceof EE_Form_Input_Base) {
             $html .= apply_filters('FHEE__EE_Form_Section_Layout_Base__layout_form__loop_for_input_' . $name . '__in_' . $this->_form_section->name(), $this->layout_input($subsection), $this->_form_section, $subsection);
         } elseif ($subsection instanceof EE_Form_Section_Base) {
             $html .= apply_filters('FHEE__EE_Form_Section_Layout_Base__layout_form__loop_for_non_input_' . $name . '__in_' . $this->_form_section->name(), $this->layout_subsection($subsection), $this->_form_section, $subsection);
         }
     }
     return $html;
 }