/// <summary>
/// Takes a valid media string and parses the medium information.
/// </summary>
internal CssMedium ParseMedium(String source)
{
var tokenizer = CreateTokenizer(source, _config);
var token = tokenizer.Get();
var state = new CssUnknownState(tokenizer, this);
var medium = state.CreateMedium(ref token);
return token.Type == CssTokenType.Eof ? medium : null;
}
