code: function Cylinder(diameter, height, options) {
    console.log("parts.Cylinder", diameter, height, options);
    options = {
      ...options,
      start: [0, 0, 0],
      end: [0, 0, height],
      radius: diameter / 2
    };
    return CSG$2.cylinder(options);
  }
docs: [Cylinder description]
  @param {Number} diameter Diameter of the cylinder
  @param {Number} height   Height of the cylinder
  @param {Number} options  Options passed to the `CSG.cylinder` function.
  @return {CSG} A CSG Cylinder