code: def test_nested_type_to_spark(self):
      ht = hl.utils.range_table(10)
      ht = ht.annotate(nested=hl.dict({"tup": hl.tuple([ht.idx])}))
      ht.to_spark()
  
imports: from typing import Optional
  import unittest
  from hail.expr import coercer_from_dtype
  from hail.expr.types import *
  from hail.genetics import reference_genome
  from ..helpers import *
  from hail.utils.java import Env
label_desc: Use image node_id 8 for calling the Tests obj's underlying member method code with example usage: obj.test_nested_type_to_spark() without return types