EntityFilterProvider<SourceActivity> filter = pipeline.getType().getSourceActivityFilterProvider(pipeline);
Receiver<Source> receiver = ActivityContentAcceptor.create(controller, opNode, activity);
SourceContentProvider p = new SourceContentProvider(controller.getProject(), filter, receiver);
configure(p);
addContentProviderActions(popup, activity, p);
SourceActivityNode sourceNode = (SourceActivityNode) activityNode;
popup.addActions(new UseSourceFromPreviousOperationAction(controller, sourceNode),
new UseSourceFromHttpEndpointAction(controller, sourceNode),
controller.getTestConnectionAction());
addAssignPluginAction(popup);
}