Remove input text view

[lingxiao]

Is there away to remove the input text view? I tried doing:
style.inputView = TrivialInputView.self

And defining a TrivialnputView by modifying what is found here: https://github.com/steve228uk/MessengerKit/blob/05168377536ebeae3653edfa5acc6410895cd72f/MessengerKit/Input/Styles/iMessage/MSGImessageInputView.swift.

But it crashes outright with error: Thread 1: Fatal error: Unexpectedly found nil while implicitly unwrapping an Optional value for tint color. Even though it is specified.