Provides a basic example of a scripting function which executes through a remote procedure call (RPC).
In a client scope, the function delegates to the module's RPC handler, which then calls multiply on the gateway and returns the result.
scripting-function-common defines the interface and abstract class that all the implementing functions must adhere to, regardless of scope.
The ClientScriptModule class creates the actual RPC handler, using the API's ModuleRPCFactory.create() method.
An instance of ClientScriptModule is used in the Designer and Client scope to provide details about the function. When actually executed, the ModuleRPCFactory will automatically call the GatewayHook's getRPCHandler method, which returns the GatewayScriptModule with the actual implementation of MathBlackBox.
The ModuleRPCFactory handles the "heavy lifting" of passing values back and forth between scopes.