/// <summary>
/// Checks whether the manager contains a directive of the name
/// specified by <paramref name = "directiveName" />.
/// </summary>
/// <param name = "directiveName">The name.</param>
/// <returns>
/// <c>true</c> if it already contains an directive; otherwise, <c>false</c>.
/// </returns>
public bool Contains(string directiveName)
{
return(_directiveManager.Contains(directiveName));
}
