`HasValuesListener`

The HasValuesListener type describes a function that is used to listen to Values as a whole being added to or removed from the Store.

(
  store: Store,
  hasValues: boolean,
): void

	Type	Description
`store`	`Store`	A reference to the `Store` that changed.
`hasValues`	`boolean`	Whether `Values` now exist or not.
returns	`void`	This has no return value.

A HasValuesListener is provided when using the addHasValuesListener method. See that method for specific examples.

When called, a HasValuesListener is given a reference to the Store. It is also given a flag to indicate whether Values now exist (having not done previously), or do not (having done so previously).

Since

v4.4.0