code: def verify_assignments(assignments):
      for cur in assignments:
          for x, y in zip(cur[0:-1], cur[1:]):
              assert x[1].used < y[1].defined
  
imports: import networkx
  import collections
  import time
  import copy
  from caffe2.python import workspace, core
  from caffe2.proto import caffe2_pb2
  import enum
  import logging
  import caffe2.python._import_c_extension
label_desc: Use image node_id 25 for calling a global function with example usage: verify_assignments(assignments) without return types