code: public static <N> TopLevelDocument<N> TopLevelDocument(final NamespaceBindings bindings,
                                                           final N type,
                                                           final URI identity,
                                                           final NamedProperties<N> properties) {
      return new TopLevelDocument.Impl<>(
              bindings.getBindings(),
              type,
              identity,
              properties.getProperties());
    }
docs: Factory for {@link TopLevelDocument}.
  
  <p>
  This builds a new TopLevelDocument using the supplied data.
  </p>
  
  @param bindings    the namespace bindings
  @param type        the type of the document
  @param identity    the identity of the document
  @param properties  the property list of the document
  @param <N>         the property name type
  @return  a new TopLevelDocument instance