class_docstr: Transforms group-by-item spec into the dundered name.
class_docstr_tok: ["Transforms","group-by-item","spec","into","the","dundered","name","."]
code: def transform(self, spec_set: InstanceSpecSet) -> Sequence[str]:
      names_to_return = []
  
      for time_dimension_spec in spec_set.time_dimension_specs:
          items = list(
              entity_link.element_name
              for entity_link in time_dimension_spec.entity_links
          ) + [time_dimension_spec.element_name]
          if time_dimension_spec.date_part is not None:
              items.append(
                  DunderNamingScheme.date_part_suffix(
                      date_part=time_dimension_spec.date_part
                  )
              )
          else:
              items.append(time_dimension_spec.time_granularity.value)
          names_to_return.append(DUNDER.join(items))
  
      for other_group_by_item_specs in (
          spec_set.entity_specs + spec_set.dimension_specs
      ):
          items = list(
              entity_link.element_name
              for entity_link in other_group_by_item_specs.entity_links
          ) + [other_group_by_item_specs.element_name]
          names_to_return.append(DUNDER.join(items))
  
      return sorted(names_to_return)
  
imports: from __future__ import annotations
  import re
  from typing import Optional, Sequence, Tuple
  from dbt_semantic_interfaces.naming.keywords import DUNDER
  from dbt_semantic_interfaces.references import EntityReference
  from dbt_semantic_interfaces.type_enums import TimeGranularity
  from dbt_semantic_interfaces.type_enums.date_part import DatePart
  from typing_extensions import override
  from metricflow.naming.naming_scheme import QueryItemNamingScheme
  from metricflow.specs.patterns.entity_link_pattern import EntityLinkPattern, EntityLinkPatternParameterSet, ParameterSetField
  from metricflow.specs.specs import InstanceSpec, InstanceSpecSet, InstanceSpecSetTransform
label_desc: Use image node_id 1 for calling the _DunderNameTransform obj's underlying member method code with example usage: obj.transform(spec_set) and returns: sorted