/// <summary>
/// Removes the last item from the list.
/// </summary>
/// <returns> </returns>
/// <exception cref="InvalidOperationException">Thrown if the list is empty.</exception>
public ImmList <T> RemoveLast()
{
this.CheckNotEmpty();
var ret = Root.RemoveLast(Lineage.Immutable).Wrap();
#if ASSERTS
if (ret.Root.Measure > 0)
{
ret.Last.AssertEqual(this[-2]);
}
ret.Root.Measure.AssertEqual(Root.Measure - 1);
#endif
return(ret);
}
