assertFalse(output.hasNode(TestSequencersHolder.DERIVED_NODE_NAME));
session.sequence("Counting sequencer", content, output);
assertTrue(output.hasNode(TestSequencersHolder.DERIVED_NODE_NAME));
session.refresh(false);
assertFalse(session.getRootNode().hasNode("files"));
assertFalse(session.getRootNode().hasNode("output"));
}