diff --git a/core/modules/field/src/Plugin/migrate/source/d7/Field.php b/core/modules/field/src/Plugin/migrate/source/d7/Field.php
index b1b1a61..348c28c 100644
--- a/core/modules/field/src/Plugin/migrate/source/d7/Field.php
+++ b/core/modules/field/src/Plugin/migrate/source/d7/Field.php
@@ -82,7 +82,10 @@ public function fields() {
   }
 
   /**
-   * TODO
+   * Returns available fields for the Field source plugin.
+   *
+   * @return array
+   *   Available fields in the source.
    */
   public function getFieldFields() {
     return [
@@ -98,7 +101,10 @@ public function getFieldFields() {
   }
 
   /**
-   * TODO
+   * Returns available fields for the FieldInstance source plugin.
+   *
+   * @return array
+   *   Available fields in the source.
    */
   public function getFieldInstanceFields() {
     return [