MIT licensed and maintained by Nikita Volkov
This version can be pinned in stack with:contravariant-extras-0.3.3.1@sha256:6d1dc8dde5946f422f8f2918589b504649e2b04172df4ec7852ff9686c600b12,1662
Used by 1 package in nightly-2018-01-25(full list with versions):