<SYSTEM_TASK:>
Solve the following problem using Python, implementing the functions described below, one line at a time
<END_TASK>
<USER_TASK:>
Description:
 def get_workflow(self):
 """Returns the instantiated workflow class."""

        extra_context = self.get_initial()
        entry_point = self.request.GET.get("step", None)
        workflow = self.workflow_class(self.request,
                                       context_seed=extra_context,
                                       entry_point=entry_point)
        return workflow