class_docstr: Initialize a session by a list of :class:`SessionInit` instance, executed one by one.
  This can be useful for, e.g., loading several models from different files
  to form a composition of models.
class_docstr_tok: ["Initialize","a","session","by","a","list","of",":","class",":","`","SessionInit","`","instance",",","executed","one","by","one",".","This","can","be","useful","for",",","e.g.",",","loading","several","models","from","different","files","to","form","a","composition","of","models","."]
code: def _setup_graph(self):
      for i in self.inits:
          i._setup_graph()
  
imports: import os
  import numpy
  import six
  from ..compat import tfv1
  from ..utils import logger
  from .common import get_op_tensor_name
  from .varmanip import SessionUpdate, get_checkpoint_path, get_savename_from_varname, is_training_name
label_desc: Use image node_id 2 for calling the ChainInit obj's underlying member method code with example usage: obj._setup_graph() without return types