code: def test_composite_state_slice(self):
      def f(n):
          d = {"a": n}
          k = "a"
          while n > 0:
              d[k] += 1
              n -= 1
          return d[k], n
  
      self.assertTransformedResult(f, custom_constant(5), (10, 0))
  
imports: import collections
  from nvidia.dali._autograph.converters import break_statements
  from nvidia.dali._autograph.converters import continue_statements
  from nvidia.dali._autograph.converters import control_flow
  from nvidia.dali._autograph.core import converter_testing
  from nvidia.dali._autograph.utils.all_utils import custom_constant
label_desc: Use image node_id 4 for calling the WhileStatementTest obj's underlying member method code with example usage: obj.test_composite_state_slice() and returns: d,  n