code: def assemble(self):
      for i in self.nodes_dict:
          self._assemble_node(i)
  
file_path: dgl/examples/pytorch/jtnn/jtnn/mol_tree_nx.py
imports: import dgl
  import numpy
  import rdkit.Chem
  from .chemutils import decode_stereo, enum_assemble_nx, get_clique_mol, get_mol, get_smiles, set_atommap, tree_decomp
label_desc: Use image node_id 6 for calling the DGLMolTree obj's underlying member method code with example usage: obj.assemble() without return types