code: def contains(a, b):
      """
  
      >>> contains({'x': 1, 'y': 2}, {'x': 1})
      True
      >>> contains({'x': 1, 'y': 2}, {'z': 3})
      False
      """
      return all(a.get(k) == v for k, v in b.items())
  
imports: from __future__ import annotations
  import pickle
  from collections import namedtuple
  import pytest
  from dask.core import flatten, get, get_dependencies, get_deps, getcycle, has_tasks, ishashable, iskey, istask, literal, preorder_traversal, quote, subs, validate_key
  from dask.utils_test import GetFunctionTestMixin, add, inc
label_desc: Use image node_id 1 for calling a global function with example usage: contains(a, b) and returns: all