code: def _consolidate(data_type):
      
      if isinstance(data_type, _ATOMIC):
          out = data_type
      elif isinstance(data_type, Array):
          element_type = _consolidate(data_type.element_type)
          out = data_type._replace(element_type=element_type)
      elif isinstance(data_type, Structure):
          fields = tuple(
              Field(*(_consolidate(field[i]) if i == _FIELD_TYPE_IDX
                      else field[i]
                      for i in _range(len(field))))
              for field in data_type.fields)
          out = data_type._replace(fields=fields)
  
      return out
docs: Enforce the structure of the data type.
  
      Specifically, ensure that if a field is defined as a generic tuple, then it
      will be converted into an instance of `Field`.