I’m having troubles with a FORM in Drupal 8, the idea is:

Chose a radio value from radio-estaciones to recharge radio-contaminantes, but, after the callback, the result I see is empty, but in replace command I use, I see it correcly

This is the code of buildForm

public function buildForm(array $form, DrupalCoreFormFormStateInterface $form_state){      $arrRadioContaminantes = array();     $arrRadioContaminantes["0"] = t("ALL");      //My function to access DB     $result = Drupalmap_dataControllerContaminante::list();     foreach ($result as $it){         $arrRadioContaminantes[$it["id_contaminante"]] = t($it["description"]);     }      $form['radio_contaminantes'] = array(         '#type' => 'radios',         '#options' => $arrRadioContaminantes,         '#ajax' => [             'callback' => '::seleccionContaminantes',             'disable-refocus' => true,             'event' => 'change',             'wrapper' => 'radios-estaciones',             'method' => 'replace'         ]     );      $form['radio_estaciones'] = array(         '#type' => 'radios',         '#id' => 'radios-estaciones',         '#options' => ['-1'=>t("SELECT CONTAMINANTE FIRST")]     );      $form['actions']['#type'] = 'actions';     $form['actions']['submit'] = array(         '#type' => 'submit',         '#value' => $this->t('Submit'),         '#button_type' => 'primary',     );      $form_state->setCached(false);     $form_state->setRebuild(true);      return $form; } 

This is callback function:

public function seleccionContaminantes(array &$form, FormStateInterface $form_state){     if($form_state->getValue("radio_contaminantes") != 0){         $form['radio_estaciones']["0"] = t("All");     }      //My Database function     $resultado = Drupalmontar_mapaControllerEstacion::list($form_state->getValue("radio_contaminantes"));     foreach ($resultado as $it){         $form['radio_estaciones'][$it["id"]] = t($it["name"]);     }      $ajaxResp = new AjaxResponse();     $ajaxResp->addCommand(new DrupalCoreAjaxReplaceCommand('radios-estaciones', Drupal::service('renderer')->render($form['radio_estaciones'])));      return $ajaxResp; } 

I try returning $form[‘radio_estaciones’] with same results, and try DataCommand pasing new values, same result… I need help