presto-main/src/main/java/io/prestosql/GroupByHashPageIndexerFactory.java/GroupByHashPageIndexerFactory/GroupByHashPageIndexerFactory
class GroupByHashPageIndexerFactory:    @Inject
    public GroupByHashPageIndexerFactory(JoinCompiler joinCompiler)
    {
        this.joinCompiler = requireNonNull(joinCompiler, "joinCompiler is null");
    }