inline fun <reified K, reified V> Any?.asLinkedMap(): LinkedHashMap<K, V>? {
    return (this as? Map<*, *>)
            ?.takeIf {
                it.entries.all { (key, value) -> key is K && value is V }
            }
            ?.map { (key, value) -> Pair(key as K, value as V) }
            ?.toMap(LinkedHashMap())
}

it.values.all { it != null }