When your function is doing nothing but simply evaluating the expression and returning a result, you can omit the curly braces. Look at how we are using it in multiple places:
override fun getItemCount() = items.size
fun buildScope(): Scope = Scope.build(Scope.R_BASICPROFILE, Scope.R_EMAILADDRESS, Scope.W_SHARE)
override fun getCount(): Int = 3 // Show 3 total pages.
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