The preceding statement is parsed into the following code in the C++ header file:
```cpp
#include "a/b/d.h"
#include "a/b/d.h"
usingC::D;
```
...
...
@@ -347,11 +347,10 @@ export default {
#### Calling Methods from the Client for IPC
When the client calls **connectAbility()** to connect to a Service ability, the **onConnect** callback in **onAbilityConnectDone** of the client receives the **IRemoteObject** instance returned by the **onConnect()** method of the Service ability. The client and Service ability are in different applications. Therefore, the directory of the client application must contain a copy of the .idl file (the SDK automatically generates the proxy class). The **onConnect** callback then uses the **IRemoteObject** instance to create the **testProxy** instance of the **IdlTestServiceProxy** class and calls the related IPC method. The sample code is as follows:
When the client calls **connectServiceExtensionAbility()** to connect to a Service ability, the **onConnect** callback in **onAbilityConnectDone** of the client receives the **IRemoteObject** instance returned by the **onConnect()** method of the Service ability. The client and Service ability are in different applications. Therefore, the directory of the client application must contain a copy of the .idl file (the SDK automatically generates the proxy class). The **onConnect** callback then uses the **IRemoteObject** instance to create the **testProxy** instance of the **IdlTestServiceProxy** class and calls the related IPC method. The sample code is as follows: