Retrieving the Function Call Manager

The Function Call Manager is used to handle services specific to function calls, such as handling requests for a particular function. The Function Call Manager is represented by a FunctionCallManager object.

Declare the Function Call Manager before requesting it from the IFX Manager.
- In the following example, the FciFunctionCall constructor declares the Function Call Manager with the type FunctionCallManager.
```
      public FciFunctionCall(IFX IFXMan) throws UWIException
      {
         FunctionCallManager theFCM;
      }
```
Use the IFSSingleton method getFunctionCallManager in the function call constructor to request a FunctionCallManager object from the IFX Manager.
- The getFunctionCallManager call requests the Function Call Manager from the IFX Manager.
- The return value of the getFunctionCallManager method is a generic object, and must be typecast to the object type you have requested. In this case, the object returned from getFunctionCallManager is typecast to FunctionCallManager.
- In the following example the FciFunctionCall constructor requests the Function Call Manager (FCM Notice that before the Function Call Manager is returned, it is explicitly cast to the type FunctionCallManager.
```
   public FciFunctionCall(IFX IFXMan) throws UWIException
      {
      FunctionCallManager theFCM;
         if ((theFCM = IFSSingleton.getFunctionCallManager()) == null) 
            throw new UWIException("Needed Function Call Manager");
      }
```