The field that triggers re-renders.
OptionalisIf set to true then the component is re-rendered whenever the field itself, its parent fields or descendant
fields are updated. If set to false then the component re-rendered only if the field was directly changed
(updates from parent and descendants are ignored, even if they affect the value of the field).
OptionalonTriggered when the field value received a non-transient update.
Options of the useFieldSubscription hook.