return old genre subcommand of $self;
return instance of cascading subcommand invoked if it was listed in your constant subcommands.
return package name of subcommand if the subcommand invoked is in you constant subcommands
otherwise, return undef
Display an one-line brief usage of the command object. Optionally, a file
could be given to extract the usage from the POD.
Display usage. If $want_detail is true, the DESCRIPTION
section is displayed as well.
Localizes the body of (formatted) text in $text, and returns the
Return the filename for the command module.