/// <summary>
/// Applies the specified function on every item in the collection, from last to first, and stops when the function returns false.
/// </summary>
/// <param name="function"> The function. </param>
/// <returns> </returns>
/// <exception cref="ArgumentNullException">Thrown if the argument null.</exception>
public override bool ForEachWhile(Func <T, bool> function)
{
function.CheckNotNull("function");
return(Root.ForEachWhile((k, v) => function(k)));
}
/// <summary>
/// Applies the specified function on every item in the collection, from last to first, and stops when the function returns false.
/// </summary>
/// <param name="function"> The function. </param>
/// <returns> </returns>
/// <exception cref="ArgumentNullException">Thrown if the argument null.</exception>
public override bool ForEachWhile(Func <KeyValuePair <TKey, TValue>, bool> function)
{
function.CheckNotNull("function");
return(_root.ForEachWhile((eqKey, v) => function(Kvp.Of(eqKey, v))));
}