usage sample

apps/shared/declarations/rage-fw-shared-types/index.d.ts

@@ -1,6 +1,6 @@
 declare module 'rage-fw-shared-types' {
     export interface RageFW_ICustomClientEvent {
-        customClientEvent(greetings: string): string
+        customClientEvent(greetings: string): Promise<string>
     }
 
     export interface RageFW_ICustomServerEvent {