final DataTreeCandidate dataTreeCandidate = mock(DataTreeCandidate.class);
final DataTreeCandidateNode dataTreeCandidateNode = mock(DataTreeCandidateNode.class);
doReturn(dataTreeCandidateNode).when(dataTreeCandidate).getRootNode();
final DataTreeCandidate dataTreeCandidate = mock(DataTreeCandidate.class);
final DataTreeCandidateNode dataTreeCandidateNode = mock(DataTreeCandidateNode.class);
doReturn(dataTreeCandidateNode).when(dataTreeCandidate).getRootNode();