@NotNull public <K,V> KataMap<K,V> empty()
K - key type
V - value type
class KataMap@NotNull public <K,V> KataMap<K,V> invoke(@NotNull kotlin.Pair... kvs)
K - key type
V - value type
kvs - key-value pairs used to build the mapclass KataMap containing all the provided key-value pairs kvs