/**
 * Replace all child nodes of the given target node to the child nodes of source node.
 * @param target Target node, all child nodes of this node will be removed if keepExistingChildren is not set to true
 * @param source (Optional) source node, all child nodes of this node will be move to target node
 * @param keepExistingChildren (Optional) When set to true, all existing child nodes of target will be kept
 */
export default function moveChildNodes(target: Node, source?: Node, keepExistingChildren?: boolean): void;