How to get Context in onViewCreated

Question

I'm attempting to configure a RecyclerView adapter and I have a line of code

val decorator = AppCompatResources.getDrawable(context, R.drawable.decorator)

This line of code will not work however as context is nullable and getDrawable requires context. I can think of 4 potential options for getting a non-nullable context in onViewCreated:

1. Wrap the code in context?.let {}
2. Wrap the code in activity?.applicationContext?.let {}
3. Use requireContext()
4. Get context from my application. My application class includes the following code:

    override fun onCreate() {
        super.onCreate()
        instance = this
    }

    companion object {
        lateinit var instance: MyApp
            private set

        val context: Context
            get() = instance
    }

My dev lead is not a fan of requireContext, and will request that I remove it if he sees it in a pull request. Is he wrong? Help me get Context smart, which of these options are the best and why?