@MethodsAreNonnullByDefault

Package org.sonar.java.collections

https://en.wikipedia.org/wiki/Persistent_data_structure

Interface Summary

Interface	Description
PMap<K,V>	Persistent (functional) Map.
PSet<E>	Persistent (functional) Set.
PStack<E>	Persistent (functional) Stack.

Class Summary

Class	Description
PCollections