function map (obj, otherThing) {
  if (obj.x == undefined) {
    return mapInitial(obj, otherThing);
  } else {
    return mapCompose(obj, otherThing);
  }
}

function map (obj, otherThing) : any {
  if (obj.x == undefined) {
    return mapInitial<any, any>(obj as any, otherThing as any);
  } else {
    return mapCompose<any, any>(obj as any, otherThing as any);
  }
}