/**
 * Diff the children of a virtual node
 * @param {import('../internal').PreactElement} parentDom The DOM element whose
 * children are being diffed
 * @param {import('../internal').VNode} newParentVNode The new virtual
 * node whose children should be diff'ed against oldParentVNode
 * @param {import('../internal').VNode} oldParentVNode The old virtual
 * node whose children should be diff'ed against newParentVNode
 * @param {object} globalContext The current context object - modified by getChildContext
 * @param {boolean} isSvg Whether or not this DOM node is an SVG node
 * @param {Array<import('../internal').PreactElement>} excessDomChildren
 * @param {Array<import('../internal').Component>} commitQueue List of components
 * which have callbacks to invoke in commitRoot
 * @param {Node | Text} oldDom The current attached DOM
 * element any new dom elements should be placed around. Likely `null` on first
 * render (except when hydrating). Can be a sibling DOM element when diffing
 * Fragments that have siblings. In most cases, it starts out as `oldChildren[0]._dom`.
 * @param {boolean} isHydrating Whether or not we are in hydration
 */
export function diffChildren(parentDom: import('../internal').PreactElement, newParentVNode: import('../internal').VNode, oldParentVNode: import('../internal').VNode, globalContext: object, isSvg: boolean, excessDomChildren: Array<import('../internal').PreactElement>, commitQueue: Array<import('../internal').Component>, oldDom: Node | Text, isHydrating: boolean): void;
/**
 * Flatten and loop through the children of a virtual node
 * @param {import('../index').ComponentChildren} children The unflattened
 * children of a virtual node
 * @param {(vnode: import('../internal').VNode) => import('../internal').VNode} [callback]
 * A function to invoke for each child before it is added to the flattened list.
 * @param {Array<import('../internal').VNode | string | number>} [flattened] An flat array of children to modify
 * @returns {import('../internal').VNode[]}
 */
export function toChildArray(children: import('../index').ComponentChildren, callback?: ((vnode: import('../internal').VNode) => import('../internal').VNode) | undefined, flattened?: (string | number | import("../internal").VNode<any>)[] | undefined): import('../internal').VNode[];