code: function getStylesheetsFromDocument(rootNode) {
  	return Array.from(rootNode.styleSheets).filter(sheet =>
  		filterMediaIsPrint(sheet.media.mediaText)
  	);
  }
docs: Get stylesheets from `document`
  -> filter out stylesheet that are `media=print`
  
  @param {Object} rootNode `document`
  @returns {Array<Object>}