function someObject(
  object: ?Object,
  callback: (value: any, name: string, object: Object) => any,
  context?: any,
): boolean {
  for (var name in object) {
    if (hasOwnProperty.call(object, name)) {
      if (callback.call(context, object[name], name, object)) {
        return true;
      }
    }
  }
  return false;
}
Executes the provided `callback` once for each enumerable own property in the
object until it finds one where callback returns a truthy value. If such a
property is found, `someObject` immediately returns true. Otherwise, it
returns false.

The `callback` is invoked with three arguments:

 - the property value
 - the property name
 - the object being traversed

Properties that are added after the call to `someObject` will not be
visited by `callback`. If the values of existing properties are changed, the
value passed to `callback` will be the value at the time `someObject`
visits them. Properties that are deleted before being visited are not
visited.