public Observable<ServiceResponse<P2SVpnGatewayInner>> getByResourceGroupWithServiceResponseAsync(String resourceGroupName, String gatewayName) {
        if (this.client.subscriptionId() == null) {
            throw new IllegalArgumentException("Parameter this.client.subscriptionId() is required and cannot be null.");
        }
        if (resourceGroupName == null) {
            throw new IllegalArgumentException("Parameter resourceGroupName is required and cannot be null.");
        }
        if (gatewayName == null) {
            throw new IllegalArgumentException("Parameter gatewayName is required and cannot be null.");
        }
        final String apiVersion = "2018-08-01";
        return service.getByResourceGroup(this.client.subscriptionId(), resourceGroupName, gatewayName, apiVersion, this.client.acceptLanguage(), this.client.userAgent())
            .flatMap(new Func1<Response<ResponseBody>, Observable<ServiceResponse<P2SVpnGatewayInner>>>() {
                @Override
                public Observable<ServiceResponse<P2SVpnGatewayInner>> call(Response<ResponseBody> response) {
                    try {
                        ServiceResponse<P2SVpnGatewayInner> clientResponse = getByResourceGroupDelegate(response);
                        return Observable.just(clientResponse);
                    } catch (Throwable t) {
                        return Observable.error(t);
                    }
                }
            });
    }
public Observable < ServiceResponse < P2SVpnGatewayInner > > getByResourceGroupWithServiceResponseAsync ( String resourceGroupName , String gatewayName ) { if ( this . client . subscriptionId ( ) == null ) { throw new IllegalArgumentException ( "Parameter this.client.subscriptionId() is required and cannot be null." ) ; } if ( resourceGroupName == null ) { throw new IllegalArgumentException ( "Parameter resourceGroupName is required and cannot be null." ) ; } if ( gatewayName == null ) { throw new IllegalArgumentException ( "Parameter gatewayName is required and cannot be null." ) ; } final String apiVersion = "2018-08-01" ; return service . getByResourceGroup ( this . client . subscriptionId ( ) , resourceGroupName , gatewayName , apiVersion , this . client . acceptLanguage ( ) , this . client . userAgent ( ) ) . flatMap ( new Func1 < Response < ResponseBody > , Observable < ServiceResponse < P2SVpnGatewayInner > > > ( ) { @ Override public Observable < ServiceResponse < P2SVpnGatewayInner > > call ( Response < ResponseBody > response ) { try { ServiceResponse < P2SVpnGatewayInner > clientResponse = getByResourceGroupDelegate ( response ) ; return Observable . just ( clientResponse ) ; } catch ( Throwable t ) { return Observable . error ( t ) ; } } } ) ; }
Retrieves the details of a virtual wan p2s vpn gateway.

@param resourceGroupName The resource group name of the P2SVpnGateway.
@param gatewayName The name of the gateway.
@throws IllegalArgumentException thrown if parameters fail the validation
@return the observable to the P2SVpnGatewayInner object