Added style class definitions to *Style.d.ts

components/lib/inlinemessage/style/InlineMessageStyle.d.ts

@@ -1,3 +1,18 @@
+/**
+ *
+ * InlineMessage component is useful in cases where a single message needs to be displayed related to an element such as forms. It has one property, severity of the message.
+ *
+ * [Live Demo](https://www.primevue.org/inlinemessage/)
+ *
+ * @module inlinemessagestyle
+ *
+ */
 import { BaseStyle } from '../../base/style';
 
+export enum InlineMessageClasses {
+    root = 'p-inline-message',
+    icon = 'p-inline-message-icon',
+    text = 'p-inline-message-text'
+}
+
 export interface InlineMessageStyle extends BaseStyle {}