void verifyLinks(Package package, String origin)

Don't call this method more than once, and only after you've generated all docs for the Package.

Source

void verifyLinks(Package package, String origin) {
  assert(_hrefs == null);
  _hrefs = package.allHrefs;

  final Set<String> visited = new Set();
  final String start = 'index.html';
  stdout.write('\nvalidating docs...');
  _doCheck(package, origin, visited, start);
  _doOrphanCheck(package, origin, visited);
  _doSearchIndexCheck(package, origin, visited);
}