docs: function BuildSVG() {
          var tag = arguments.length <= 0 || arguments[0] === undefined ? 'svg' : arguments[0];
          var props = arguments.length <= 1 || arguments[1] === undefined ? {} : arguments[1];
  
          _classCallCheck(this, BuildSVG);
  
          this.tag = tag;
          this.element = document.createElementNS("http://www.w3.org/2000/svg", this.tag);
          this.attr(props);
      }