code: def test_counter_list():
      t = hl.utils.range_matrix_table(1, 1)
      t = t.annotate_entries(l=["hello"])
      result = t.aggregate_entries(hl.agg.counter(t.l))
  
      assert list(result) == [frozenlist(["hello"])]
  
      assert list(result.values()) == [1]
  
imports: from typing import Dict
  import hail
  from hailtop.frozendict import frozendict
  from hailtop.hail_frozenlist import frozenlist
label_desc: Use image node_id 2 for calling a global function with example usage: test_counter_list() without return types