Adding BC for typedConfigManager and cspell words to ignore.

.cspell-project-words.txt

+Addok
+addok
+addresstext
+apikey
+arcgisonline
+azuremaps
+banfrance
+behaviour
+bingmaps
+Bpost
+bpost
+countrycode
+davedevelopment
+Enpoints
+freegeoip
+gecoder
+Geocdoer
+Geocodes
+geocodes
+Geohash
+geohash
+geojsonfile
+Geonames
+geonames
+Geophp
+geophp
+geoplugin
+Geopunt
+geopunt
+googlemaps
+gpxfile
+graphhopper
+hostip
+ipinfodb
+kmlfile
+latlng
+latlon
+Mapbox
+mapbox
+mapquest
+maptiler
+maxmind
+mecanism
+Nominatim
+nominatim
+opencage
+Opene
+Openrouteservice
+openrouteservice
+openstreetmap
+securitychecker
+Stiphle
+stiphle
+Tidi
+tomtom
+updb
+Wallonie
+willdurand
\ No newline at end of file

src/Form/SettingsForm.php

@@ -2,6 +2,8 @@
 
 namespace Drupal\geocoder\Form;
 
+use Drupal\Core\Config\ConfigFactoryInterface;
+use Drupal\Core\Config\TypedConfigManagerInterface;
 use Drupal\Core\Form\ConfigFormBase;
 use Drupal\Core\Form\FormStateInterface;
 use Symfony\Component\DependencyInjection\ContainerInterface;
@@ -11,13 +13,6 @@ use Symfony\Component\DependencyInjection\ContainerInterface;
  */
 class SettingsForm extends ConfigFormBase {
 
-  /**
-   * {@inheritdoc}
-   */
-  public static function create(ContainerInterface $container) {
-    return parent::create($container);
-  }
-
   /**
    * {@inheritdoc}
    */
@@ -37,8 +32,15 @@ class SettingsForm extends ConfigFormBase {
    */
   public function buildForm(array $form, FormStateInterface $form_state) {
     $config = $this->config('geocoder.settings');
-
-    $geocoder_config_schema = $this->typedConfigManager->getDefinition('geocoder.settings') + ['mapping' => []];
+    if (property_exists(ConfigFormBase::class, 'typedConfigManager')) {
+      $geocoder_config_schema = $this->typedConfigManager->getDefinition('geocoder.settings') + ['mapping' => []];
+    }
+    else {
+      // Handling backward compatiblity before D10.2
+      // Calling typedConfigManager() of  ConfigFormBase class. 
+      $geocoder_config_schema = $this->typedConfigManager();
+    }
+    
     $geocoder_config_schema = $geocoder_config_schema['mapping'];
 
     // Attach Geofield Map Library.