sub get_keyword_names {
    my ($self) = @_;
    my $class = $self->lib;
    my @methods = Class::Inspector->methods( $class, 'public' );
    return \@methods;
}

sub run_keyword {
   my $self = shift;
   my ($stdout, $stderr) = capture { ... };
}
sub start_server {
    my $self = shift;
    $self->backend->start_server;
}