What is the correct way to handle methods which will not be called by the user? For example if the user calls a method, say do_stuff() from a driver script, and if do_stuff() relies on other subroutines, is it best practice to call those subs from within the do_stuff() method as follows:

sub do_stuff {
    my ( $self, %arg ) = @_;
    #does it things
    #and then calls the private sub as follows
    _private_sub( $self, %arg );
}