code: def add_hydrogens_to_mol(mol, is_protein=False):
      """
      Add hydrogens to a molecule object
  
      Parameters
      ----------
      mol: Rdkit Mol
          Molecule to hydrogenate
      is_protein: bool, optional (default False)
          Whether this molecule is a protein.
  
  
      Returns
      -------
      Rdkit Mol
  
      Note
      ----
      This function requires RDKit and PDBFixer to be installed.
      """
      return apply_pdbfixer(
          mol, hydrogenate=True, is_protein=is_protein
      )
  
imports: import os
  import logging
  import itertools
  import numpy
  from io import StringIO
  from deepchem.utils.pdbqt_utils import pdbqt_to_pdb
  from deepchem.utils.pdbqt_utils import convert_mol_to_pdbqt
  from deepchem.utils.pdbqt_utils import convert_protein_to_pdbqt
  from deepchem.utils.geometry_utils import compute_pairwise_distances
  from deepchem.utils.geometry_utils import compute_centroid
  from deepchem.utils.fragment_utils import MolecularFragment
  from deepchem.utils.fragment_utils import MoleculeLoadException
  from typing import Any, List, Sequence, Tuple, Set, Optional, Dict, Union
  from deepchem.utils.typing import OneOrMany, RDKitMol
label_desc: Use image node_id 2 for calling a global function with example usage: add_hydrogens_to_mol(mol, is_protein) and returns: apply_pdbfixer