Can't import media image if the image field be rename by json_extra

Closes #3411886

modules/entity_share_client/src/Plugin/EntityShareClient/Processor/EntityReference.php

@@ -114,15 +114,13 @@ class EntityReference extends ImportProcessorPluginBase implements PluginFormInt
    */
   public function processEntity(RuntimeImportContext $runtime_import_context, ContentEntityInterface $processed_entity, array $entity_json_data) {
     if (isset($entity_json_data['relationships'])) {
-      $field_mappings = $runtime_import_context->getFieldMappings();
       // Loop on reference fields.
       foreach ($entity_json_data['relationships'] as $field_public_name => $field_data) {
-        $field_internal_name = array_search($field_public_name, $field_mappings[$processed_entity->getEntityTypeId()][$processed_entity->bundle()]);
-        if (!$processed_entity->hasField($field_internal_name)) {
-          $this->logger->notice('Error during import. The field @field does not exist.', ['@field' => $field_internal_name]);
+        if (!$processed_entity->hasField($field_public_name)) {
+          $this->logger->notice('Error during import. The field @field does not exist.', ['@field' => $field_public_name]);
           continue;
         }
-        $field = $processed_entity->get($field_internal_name);
+        $field = $processed_entity->get($field_public_name);
 
         if ($this->entityReferenceHelper->relationshipHandleable($field) !== EntityReferenceHelperInterface::RELATIONSHIP_HANDLEABLE) {
           continue;