Misc utilities similar to Kotlin stdlib require funcs

Require.kt

package com.beartooth.relaytestapp.util

import java.lang.ref.WeakReference

/**
 *  Require.kt
 *  author:  jefferson jones
 *  org:     Beartooth, Inc
 *  github:  github.com/masterjefferson
 *  email:   jeff@beartooth.com
 */

fun <T: Any> requireReference(weakRef: WeakReference<T>, message: String? = null): T {
  message ?: return requireNotNull(weakRef.get())
  return requireNotNull(weakRef.get()) { message }
}