def METHOD_NAME():
  o = mmtbx.clashes.from_pdb(pdb_str=pdb_good, clash_threshold=2.3)
  o.show()
  assert o.clashing_pairs() == [(9, 10), (18, 19), (3, 11)]
  print()
  o = mmtbx.clashes.from_pdb(pdb_str=pdb_poor, clash_threshold=1.5)
  o.show()
  expected_pairs = [(9, 18), (7, 19), (8, 19), (9, 19), (9, 17)]
  found_pairs = o.clashing_pairs()
  expected_pairs = sorted(expected_pairs)
  found_pairs = sorted(found_pairs)
  assert expected_pairs == found_pairs