my $method = $check->{'method'};
my %cur_svc = map { $_->$method() => $_ } @current_svc;
my @dup_svc = grep { $cur_svc{$_->$method()} } @new_svc;
my $method = $check->{'method'};
my %cur_svc = map { $_->$method() => $_ } @current_svc;
my @dup_svc = grep { $cur_svc{$_->$method()} } @new_svc;