/**
 * Check if a given node has no visible content
 * @param node The node to check
 * @param trimContent Whether trim the text content so that spaces will be treated as empty.
 * Default value is false
 * @returns True if there isn't any visible element inside node, otherwise false
 */
export default function isNodeEmpty(node: Node, trimContent?: boolean, shouldCountBrAsVisible?: boolean): boolean;