    # File lib/rubygame/sprite.rb, line 149
                            def collide_group(group)
                                    sprites = []
                                    group.each { |sprite|
                                            if self.collide_sprite?(sprite) and (not sprites.include?(sprite))
                                                    sprites.push(sprite)
                                            end
                                    }
                                    return sprites
                            end