when return type contains promise<typeName> or any that contains <> 

when method contain return type as promise<typename> 
then comments is not generated properly 
Example : 
 /**
     * @param  {IRequest[]} test
     * @returns Observable
     * @description this method call API that returns lookup data.
     */
    getUserDetails(test: IRequest[]): Observable<ILeaveLookUp | ErrorObservable> {

