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Verifying my Blockstack ID is secured with the address 1Ngxnfmf64srg6vBwowVRg3ChCUaK7XUkQ https://explorer.blockstack.org/address/1Ngxnfmf64srg6vBwowVRg3ChCUaK7XUkQ

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import android.util.Log

/** In Kotlin: add `companion object : ALog` for `log.d { "message" }`-style logging. */
open class ALog {
    val log = ALogger(javaClass.enclosingClass ?: javaClass)

    companion object {
        /** Decide if a statement should be printed based on its class and log level */
        var filter: ((Class<*>, Int) -> Boolean) = { _, _ -> true }
    }

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/**
 * Wrap an object which requires closing if present
 */
open class Closer<T>(@Volatile private var wrapped: T? = null) {

    /** Return the current wrapped value */
    operator fun invoke(): T? = wrapped

    /** If there is no value yet, store the result of [func] */
    fun open(func: () -> T) = synchronized(this) {

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class MyClass(val context: Context) {
    
    private val wifiLock = Closer<WifiManager.MulticastLock>()
    
    fun start() {
        wifiLock.open {
            // Create and open the lock (won't run if lock is already present)
            val wifiManager = context.applicationContext.getSystemService(Context.WIFI_SERVICE) as WifiManager
            wifiManager.createMulticastLock("MyClass.lock").apply {
                setReferenceCounted(true)

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class MyClass {
    @Volatile
    var resource: Resource? = null
    
    fun start() {
        synchronized(this) {
            resource ?: apply {
                resource = Resource()
            }
        }

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class MyClass {
    var resource: Resource? = null // Something we need to use for a while
    
    fun start() {
        resource = Resource()
    }
    
    fun work() {
        resource?.doSomething()
    }