my $self = bless $ibx, $class;
# TODO: maybe stop supporting this
if ($creat_opt) { # for { nproc => $N }
$self->{-creat_opt} = $creat_opt;
my $self = bless $ibx, $class;
# TODO: maybe stop supporting this
if ($creat_opt) { # for { nproc => $N }
$self->{-creat_opt} = $creat_opt;