org.cactoos
org.cactoos.bytes
org.cactoos.collection
org.cactoos.experimental
org.cactoos.func
org.cactoos.io
org.cactoos.iterable
org.cactoos.iterator
org.cactoos.list
org.cactoos.map
org.cactoos.scalar
org.cactoos.set
org.cactoos.text
org.cactoos.time