All the facets related to randomness.
Required files
facets/core/array/at_rand
facets/core/array/rand_indexes
facets/core/array/rand_subset
facets/core/array/shuffle
facets/core/hash/rand_value
facets/core/hash/rand_key
facets/core/hash/rand_pair
facets/core/hash/shuffle
facets/core/string/at_rand
facets/core/string/rand_byte
facets/core/string/shuffle
facets/core/kernel/maybe