step immediate => 1,
connect => sub { .. };
+In some case, you want to execute some code when the step finish, it can
+be done by defining a finalize code in define_steps:
+
+ my $steps = define_steps
+ cb_ref => \$finished_cb,
+ finalize => sub { .. };
+
=head2 JOINING ASYNCHRONOUS "THREADS"
With slow operations, it is often useful to perform multiple operations