lib/core/utils/preload-cssom.js
function getStylesheetsFromDocument(rootNode) {
	return Array.from(rootNode.styleSheets).filter(sheet =>
		filterMediaIsPrint(sheet.media.mediaText)
	);
}
function getStylesheetsFromDocument(rootNode) {
	return Array.from(rootNode.styleSheets).filter(sheet =>
		filterMediaIsPrint(sheet.media.mediaText)
	);
}
function getStylesheetsFromDocument ( rootNode ) { return Array . from ( rootNode . styleSheets ) . filter ( sheet => filterMediaIsPrint ( sheet . media . mediaText ) ) ; }
Get stylesheets from `document`
-> filter out stylesheet that are `media=print`

@param {Object} rootNode `document`
@returns {Array<Object>}
Get stylesheets from document - > filter out stylesheet that are media = print