/**
 * Test if a node contains another node
 * @param container The container node
 * @param contained The node to check if it is inside container
 * @param treatSameNodeAsContain When container and contained are the same node,
 * return true if this param is set to true, otherwise return false. Default value is false
 * @returns True if contained is inside container, or they are the same node when treatSameNodeAsContain is true.
 * Otherwise false.
 */
export default function contains(container: Node | null | undefined, contained: Node | null | undefined, treatSameNodeAsContain?: boolean): boolean;
/**
 * Test if a node contains a given range
 * @param container The container node
 * @param contained The range to check if it is inside container
 * @returns True if contained is inside container, otherwise false
 */
export default function contains(container: Node | null | undefined, contained: Range | null | undefined): boolean;