docstr: Performs a mutation on the ligand position.
docstr_tok: ["Performs","a","mutation","on","the","ligand","position","."]
code: def mutate_conformer(protein, ligand):
      """Performs a mutation on the ligand position."""
      return
  
imports: from __future__ import print_function
  from __future__ import division
  from __future__ import unicode_literals
  import warnings
  import numpy
  import tensorflow
  from deepchem.models import Model
  from deepchem.nn import model_ops
  import deepchem.utils.rdkit_util
label_desc: Use image node_id 5 for calling the VinaModel obj's underlying member method code with example usage: obj.mutate_conformer(protein, ligand) without return types