my %imported = map { $_ => 1 } @{ $_[0] || [] };
my @not_imported = @{ $_[1] || [] };
for (@not_imported, grep !$imported{$_}, @default_exports) {
my %imported = map { $_ => 1 } @{ $_[0] || [] };
my @not_imported = @{ $_[1] || [] };
for (@not_imported, grep !$imported{$_}, @default_exports) {