[Action required for Plugin Authors]: Upgrade to Plugin API v4 by January 4, 2024

@henry.dowling the update guide says

We are adding two new utility methods on Bubble Things:
id(): returns the Thing’s ID (synchronously – not as a promise).

and the typescript definition of BubbleThing says

export interface BubbleThing {
// NEW
/** Returns the unique ID of this Thing. */
id(): string

But when trying actual code in a plugin id is not a function, but just a property that has the value of the id as string.
properties.thing.id() throws TypeError: properties.thing.id is not a function
properties.thing.id correctly get the id of the thing.

Is this intended behavior?