/// <summary>
/// Registers a filter for attributes.
/// </summary>
/// <remarks>
/// <para>
/// Only attributes for which the predicate returns true are
/// part of the comparison. By default all attributes are
/// considered.
/// </para>
/// <para>
/// The "special" namespace, namespace-location and
/// schema-instance-type attributes can not be ignored this way.
/// If you want to suppress comparison of them you'll need to
/// implement <see cref="DifferenceEvaluator"/>
/// </para>
/// </remarks>
public CompareConstraint WithAttributeFilter(Predicate <XmlAttribute> attributeFilter)
{
diffBuilder.WithAttributeFilter(attributeFilter);
return(this);
}