export interface Path {
  prev: Path | undefined;
  key: string | number;
  typename: string | undefined;
}

/**
 * Given a Path and a key, return a new Path containing the new key.
 */
export function addPath(
  prev: Path | undefined,
  key: string | number,
  typename: string | undefined,
): Path;

/**
 * Given a Path, return an Array of the path keys.
 */
export function pathToArray(path: Path): Array<string | number>;