rb_define_method (cEvas, "top", c_top_get, 0);
rb_define_method (cEvas, "bottom", c_bottom_get, 0);
rb_define_method (cEvas, "find_object", c_find_object, 1);
rb_define_method (cEvas, "top", c_top_get, 0);
rb_define_method (cEvas, "bottom", c_bottom_get, 0);
rb_define_method (cEvas, "find_object", c_find_object, 1);