module Sketchup class Selection include Enumerable def [] end def add(*args) end def add_observer(observer) end def at(index) end def clear end def contains?(entity) end def count end def each end def empty? end def first end def include?(entity) end def is_curve? end def is_surface? end def length end alias_method :size, :length def model end def nitems end def remove(*args) end def remove_observer(observer) end def shift end def single_object? end def toggle(*args) end end end