rb_define_method (c, "get_padding", c_get_padding, 0);
rb_define_method (c, "set_padding", c_set_padding, 4);
rb_define_method (c, "append_element", c_append_element, 1);
rb_define_method (c, "prepend_element", c_prepend_element, 1);
rb_define_method (c, "remove_element", c_remove_element, 1);
rb_define_method (c, "elements", c_elements_get, 0);
rb_define_method (c, "get_padding", c_get_padding, 0);
rb_define_method (c, "set_padding", c_set_padding, 4);
rb_define_method (c, "append_element", c_append_element, 1);
rb_define_method (c, "prepend_element", c_prepend_element, 1);
rb_define_method (c, "remove_element", c_remove_element, 1);
rb_define_method (c, "elements", c_elements_get, 0);