_            _    _        _         _
      /\ \         /\ \ /\ \     /\_\      / /\
      \_\ \       /  \ \\ \ \   / / /     / /  \
      /\__ \     / /\ \ \\ \ \_/ / /     / / /\ \__
     / /_ \ \   / / /\ \ \\ \___/ /     / / /\ \___\
    / / /\ \ \ / / /  \ \_\\ \ \_/      \ \ \ \/___/
   / / /  \/_// / /   / / / \ \ \        \ \ \
  / / /      / / /   / / /   \ \ \   _    \ \ \
 / / /      / / /___/ / /     \ \ \ /_/\__/ / /
/_/ /      / / /____\/ /       \ \_\\ \/___/ /
\_\/       \/_________/         \/_/ \_____\/
ghc-witherable 0.4.2
Dependencies: ghc-base-orphans@0.8.8.2 ghc-hashable@1.4.2.0 ghc-unordered-containers@0.2.19.1 ghc-vector@0.12.3.1 ghc-indexed-traversable@0.1.2.1 ghc-indexed-traversable-instances@0.1.1.2
Channel: guix
Location: gnu/packages/haskell-xyz.scm (gnu packages haskell-xyz)
Home page: https://github.com/fumieval/witherable
Licenses: Modified BSD
Synopsis: Filterable traversable
Description:

This package provides a stronger variant of `traverse` which can remove elements and generalised mapMaybe, catMaybes, filter

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