Gets the value associated with the given key.
Gets the value associated with the given key. If there is no associated value, then create the value using the pool's value factory and return the value associated with the key. The user should declare the factory method as lazy if its side-effects need to be avoided.
The key to lookup.
The final value associated with the key. This may be different from the value created by the factory if another thread successfully put a value.
(Changed in version 2.9.0) The behavior of scanRight has changed. The previous behavior can be reproduced with scanRight.reverse.
(Changed in version 2.9.0) transpose throws an IllegalArgumentException if collections are not uniformly sized.