contains

expect operator fun <T> FastIntMap<T>.contains(key: Int): Boolean
expect operator fun <T> FastStringMap<T>.contains(key: String): Boolean
expect operator fun <K, V> FastIdentityMap<K, V>.contains(key: K): Boolean
actual inline operator fun <T> FastStringMap<T>.contains(key: String): Boolean
actual operator fun <K, V> FastIdentityMap<K, V>.contains(key: K): Boolean
actual inline operator fun <T> FastIntMap<T>.contains(key: Int): Boolean
actual inline operator fun <T> FastStringMap<T>.contains(key: String): Boolean
actual operator fun <K, V> FastIdentityMap<K, V>.contains(key: K): Boolean
actual operator fun <K, V> FastIdentityMap<K, V>.contains(key: K): Boolean