MIT licensed and maintained by Nikita Volkov
This version can be pinned in stack with:deque-0.4.3@sha256:b988c70a1599b10c7cb643e9c8b0ae4d0166bb2f39c1e13c06a0aeaff29bd9cb,1873
Used by 2 packages in lts-14.27(full list with versions):

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