size

expect val <E> PlatformList<E>.size: Int
expect val <K, V> PlatformMap<K, V>.size: Int
expect val <E> PlatformSet<E>.size: Int
actual val <E> PlatformList<E>.size: Int
actual val <K, V> PlatformMap<K, V>.size: Int
actual val <E> PlatformSet<E>.size: Int