sub Wx::Sizer::AddMany {
    my ( $self, $flags, @many ) = @_;
    $self and $flags or Carp::croak "Usage: Wx::Sizer::AddMany( THIS, optionalArrayrefOfOptions, window, ... )";
    if ( 'ARRAY' eq ref $flags ) {
        @many or Carp::croak "Usage: Wx::Sizer::AddMany( THIS, optionalArrayrefOfOptions, window, ... )";
        $self->Add( $_, @$flags ) for @many;
    }
    else { $self->Add($_) for $flags, @many; }
}