docs: private Set<Label> scopeTypeLabelsImplicitPlayers(GraqlCompute query) {
          return scopeTypes(query)
                  .filter(Concept::isRelationType)
                  .map(Concept::asRelationType)
                  .filter(RelationType::isImplicit)
                  .flatMap(RelationType::roles)
                  .flatMap(Role::players)
                  .map(SchemaConcept::label)
                  .collect(toSet());
      }