use Devel::SelfStubber;

$modulename = "Mystuff::Grok";  # no .pm suffix
$lib_dir = "";                  # defaults to current directory
Devel::SelfStubber->stub($modulename, $lib_dir);   # stubs only

# to generate the whole module with stubs inserted correctly
use Devel::SelfStubber;
$Devel::SelfStubber::JUST_STUBS = 0;
Devel::SelfStubber->stub($modulename, $lib_dir);
*****
SelfLoader->load_stubs();