assertSame(x, pdh.getRoot());
assertSame(pdh.getData(), pdh.getData());
assertSame(pdh.getSamePackageData(), pdh.getSamePackageData());
String prev = placeInTree;
for (Object o : pdh.getChildKeys()) {
SourceFileDataPair sfd = pdh.getChild(o);
checkSourceFile(sfd);
assertSame(sfd.getParent(), pdh);
placeInTree = prev;
}
}