I have the following question. The following code snippet throws me the error shown below. allowedWebhookStates contains enums. What do I have to change so that I can check whether the setOf of allowedWebhookStates contains the web.event which is a string?

private val allowedWebhookStates = setOf(
    REQUEST,
    DELIVERED ,
    UNIQUE_OPENED,
    OPENED,
    CLICK,
    SOFT_BOUNCE,
    HARD_BOUNCE,
    INVALID_EMAIL,
    DEFERRED,
    SPAM,
    UNSUBSCRIBED,
    BLOCKED,
    PROXY_OPEN,
    ERROR
)


  if (web.event in allowedWebhookStates) {

   ...

 }

Error:

Type inference failed. The value of the type parameter T should be mentioned in input types (argument types, receiver type or expected type). Try to specify it explicitly