docs: def query(self):
          """Group the self.special_coverages queries and memoize them."""
          if not self._query:
              self._query.update({
                  "excluded_ids": [],
                  "included_ids": [],
                  "pinned_ids": [],
                  "groups": [],
              })
              for special_coverage in self._special_coverages:
                  # Access query at dict level.
                  query = getattr(special_coverage, "query", {})
                  if "query" in query:
                      query = query.get("query")
                  self._query["excluded_ids"] += query.get("excluded_ids", [])
                  self._query["included_ids"] += query.get("included_ids", [])
                  self._query["pinned_ids"] += query.get("pinned_ids", [])
                  self._query["groups"] += [query.get("groups", [])]
          return self._query