diff --git a/npm/ng-packs/packages/theme-shared/extensions/src/lib/models/internal/object-extensions.ts b/npm/ng-packs/packages/theme-shared/extensions/src/lib/models/internal/object-extensions.ts
index db24cfe471..448183b8a0 100644
--- a/npm/ng-packs/packages/theme-shared/extensions/src/lib/models/internal/object-extensions.ts
+++ b/npm/ng-packs/packages/theme-shared/extensions/src/lib/models/internal/object-extensions.ts
@@ -3,11 +3,20 @@ import { EntityPropList } from '../entity-props';
 import { FormPropList } from '../form-props';
 import { PropContributorCallbacks } from '../props';
 
+export type DisplayNameGeneratorFn = (
+  displayName: LocalizableStringDto,
+  fallback: LocalizableStringDto,
+) => string;
+
+export type EntityExtensions = Record<string, EntityExtensionDto>;
+
 export interface EntityExtensionDto {
-  properties: Record<string, ExtensionPropertyDto>;
+  properties: EntityExtensionProperties;
   configuration: Record<string, object>;
 }
 
+export type EntityExtensionProperties = Record<string, ExtensionPropertyDto>;
+
 export interface ExtensionEnumDto {
   fields: ExtensionEnumFieldDto[];
   localizationResource?: string;