diff --git a/projects/igniteui-angular/src/lib/core/styles/components/drop-down/_drop-down-theme.scss b/projects/igniteui-angular/src/lib/core/styles/components/drop-down/_drop-down-theme.scss
index 82c97bcbdbe..fc26ead6ea4 100644
--- a/projects/igniteui-angular/src/lib/core/styles/components/drop-down/_drop-down-theme.scss
+++ b/projects/igniteui-angular/src/lib/core/styles/components/drop-down/_drop-down-theme.scss
@@ -11,7 +11,7 @@
 /// @param {Color} $background-color [null] - The drop-down background color.
 /// @param {Color} $header-text-color [null] - The drop-down header text color.
 ///
-///@param {Color} $item-text-color [null] - The drop-down text color.
+/// @param {Color} $item-text-color [null] - The drop-down text color.
 /// @param {Color} $hover-item-text-color [null] - The drop-down hover text color.
 ///
 /// @param {Color} $hover-item-background [null] - The drop-down hover item background color.
diff --git a/projects/igniteui-angular/src/lib/data-operations/groupby-record.interface.ts b/projects/igniteui-angular/src/lib/data-operations/groupby-record.interface.ts
index f291475b806..4d2f2273909 100644
--- a/projects/igniteui-angular/src/lib/data-operations/groupby-record.interface.ts
+++ b/projects/igniteui-angular/src/lib/data-operations/groupby-record.interface.ts
@@ -1,5 +1,8 @@
 import { ISortingExpression } from './sorting-expression.interface';
 
+/**
+ * @hidden
+ */
 export class GroupedRecords extends Array<any> {}
 
 export interface IGroupByRecord {