Enter an interface for a callback when a task is described with a one-way operation.
A task is based on a WSDL port type definition. Essentially, a task represents a "service" that is 'invoked' by an operation that contains input and optionally, an output and fault message. You must import a WSDL into your process and then select the port type and operation as an interface to the task. The operation must be a request-response type.
If your process already contains an import for the WSDL that defines the Port Type and Operation, then select the appropriate values.