Issue #3492972 by aaronbauman: Show salesforce field name alongside field label

src/Rest/RestResponseDescribe.php

@@ -281,7 +281,9 @@ class RestResponseDescribe extends RestResponse {
    */
   public function getFieldOptions() {
     if (!isset($this->fieldOptions)) {
-      $this->fieldOptions = array_column($this->fields, 'label', 'name');
+      foreach ($this->fields as $field) {
+        $this->fieldOptions[$field['name']] = $field['label'] . ' (' . $field['name'] . ')';
+      }
       asort($this->fieldOptions);
     }
     return $this->fieldOptions;