scope-kotlin.kt

// Before Refactoring
val responseAsString = response.use {
    val responseBytes = it.body()?.source()?.readByteArray()
    if (responseBytes != null) {
        String(responseBytes)
    } else throw IllegalStateException("No response from server!")
}
// With Scope Function
 val responseAsString = response.use {
    it.body()?.source()?.readByteArray()?.let { String(it) }
        ?: throw IllegalStateException("No response from server!")
}