code: def _compute_examples(self):
          
          for label in self._raw_examples:
              self._examples[label] = self._compute_example(label)
  
          # Add examples for each void union member.
          for field in self.all_fields:
              dt, _ = unwrap_nullable(field.data_type)
              if is_void_type(dt):
                  self._examples[field.name] = \
                      Example(
                          field.name, None, OrderedDict([('.tag', field.name)]))
docs: Populates the ``_examples`` instance attribute by computing full
          examples for each label in ``_raw_examples``.
  
          The logic in this method is separate from :meth:`_add_example` because
          this method requires that every type have ``_raw_examples`` assigned
          for resolving example references.