code: def test_merge_molecules_xyz(self):
      current_dir = os.path.dirname(os.path.realpath(__file__))
      ligand_file = os.path.join(
          current_dir, "../../dock/tests/1jld_ligand.sdf"
      )
      xyz, mol = rdkit_utils.load_molecule(
          ligand_file, calc_charges=False, add_hydrogens=False
      )
      merged = rdkit_utils.merge_molecules_xyz([xyz, xyz])
      for i in range(len(xyz)):
          first_atom_equal = np.all(xyz[i] == merged[i])
          second_atom_equal = np.all(xyz[i] == merged[i + len(xyz)])
          assert first_atom_equal
          assert second_atom_equal
  
imports: import tempfile
  import unittest
  import os
  import numpy
  from deepchem.utils import rdkit_utils
label_desc: Use image node_id 10 for calling the TestRdkitUtil obj's underlying member method code with example usage: obj.test_merge_molecules_xyz() without return types