private open fun submitReview(bar: MaterialRatingBar!, reviewMessage: TextInputEditText!, selectedGymUid: String!): Unit
Internal function to submit review for the selected gym
bar - MaterialRatingBar!: The rating bar object that stores the gym rating that the user has selected
reviewMessage - TextInputEditText!: The review message TextInputEditText object that stores any review of the gym that the user is currently rating
selectedGymUid - String!: Selected Gym UID