code: function _createMaskRect() {
    const element = document.createElementNS(svgNS, 'rect');
  
    _setAttributes(element, {
      fill: '#FFFFFF',
      height: '100%',
      id: elementIds.modalOverlayMaskRect,
      width: '100%',
      x: '0',
      y: '0'
    });
  
    return element;
  }
docs: <rect id="modalOverlayMaskRect" x="0" y="0" width="100%" height="100%" fill="#FFFFFF"/>