Set set = new HashSet();
set.add(source2FolderReChild);
provider.interceptAdd(new PipelinedShapeModification(source2FolderChild, set));
assertEquals(1, set.size());
PythonFolder c = (PythonFolder) set.iterator().next();
PythonSourceFolder sourceFolder = c.getSourceFolder();
assertTrue(sourceFolder instanceof PythonSourceFolder);
set.clear();
set.add(source2FolderChild);
provider.interceptRemove(new PipelinedShapeModification(source2FolderFile, set));