Objects in the file:
/  (Group)
/group1  (Group)
/group1/dset1  (Dataset)
/group1/group3  (Group)
/group1/group3/group4  (Group)
/group1/group3/group4/group1  (Group)
/group1/group3/group4/group2  (Group)

Links in the file:
/group1  (Group)
/group1/dset1  (Dataset)
/group1/group3  (Group)
/group1/group3/dset2  (Dataset)
/group1/group3/group4  (Group)
/group1/group3/group4/group1  (Group)
/group1/group3/group4/group1/group5  (Group)
/group1/group3/group4/group2  (Group)
/group2  (Group)