haskell-assoc source package in Huanghe V3.0
libghc-assoc-dev: swap and assoc: Symmetric and Semigroupy Bifunctors
libghc-assoc-doc: swap and assoc: Symmetric and Semigroupy Bifunctors; documentation
libghc-assoc-prof: swap and assoc: Symmetric and Semigroupy Bifunctors; profiling libraries