override fun checkOrganization(organizationId: String): Boolean {
    var isFound = false
    db.collection(FirebaseConstants.ORGANIZATION)
        .get()
        .addOnSuccessListener { querySnapshot ->
            for (document in querySnapshot) {
                Log.d(TAG, document.id)
                if (organizationId == document.id) {
                    isFound = true
                    
                }
            }
        }
        .addOnFailureListener { exception ->
            Log.w(TAG, "Error getting documents.", exception)
        }

    return isFound
}

I want to return from the method after the loop is completed. how to achieve that?

Idk how this whole thing is used but what comes to mind is either passing in a callback interface to this class that is overriding

checkOrganization

and invoking the callback in the

addOnSuccessListener

. Another alternative would be changing this interface (if it's internal) and using coroutines so you can return the result asynchronously.