code: def test_get_dependencies_many():
      dsk = {
          "a": [1, 2, 3],
          "b": "a",
          "c": [1, (inc, 1)],
          "d": [(sum, "c")],
          "e": ["a", "b", "zzz"],
          "f": [["a", "b"], 2, 3],
      }
  
      tasks = [dsk[k] for k in ("d", "f")]
      s = get_dependencies(dsk, task=tasks)
      assert s == {"a", "b", "c"}
      s = get_dependencies(dsk, task=tasks, as_list=True)
      assert sorted(s) == ["a", "b", "c"]
  
      s = get_dependencies(dsk, task=[])
      assert s == set()
      s = get_dependencies(dsk, task=[], as_list=True)
      assert s == []
  
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 15 for calling a global function with example usage: test_get_dependencies_many() without return types