MIT licensed and maintained by Nikita Volkov
This version can be pinned in stack with:deque-0.4.4@sha256:fc09dd0e91f526878f2a434964f1120924278492a7c8fe0d0bff2842ac2ec305,1902
Used by 2 packages in lts-18.10(full list with versions):

Strict and lazy implementations of Double-Ended Queue (aka Dequeue or Deque) based on head-tail linked list.