1  /**
 2  * select.scad
 3  *
 4  * @copyright Justin Lin, 2021
 5  * @license https://opensource.org/licenses/lgpl-3.0.html
 6  *
 7  * @see https://openhome.cc/eGossip/OpenSCAD/lib3x-select.html
 8  *
 9  **/
10  
11  module select(i) {
12      if(is_undef(i)) {
13          children();
14      }
15      else {
16          children(i);
17      }
18  }