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                  Creates a CoSum that can select the left side of a Sum. DeclarationSwift static func moveLeft<F, G>() -> CoSum<F, G, Void> where W == SumPartial<F, G>, A == Void, F : Comonad, G : ComonadReturn ValueA CoSum that selects the left side of a Sum. 
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                  Creates a CoSum that can select the right side of a Sum. DeclarationSwift static func moveRight<F, G>() -> CoSum<F, G, Void> where W == SumPartial<F, G>, A == Void, F : Comonad, G : ComonadReturn ValueA CoSum that selects the right side of a Sum. 
 
             Install in Dash
              Install in Dash
             CoSum Extension Reference
        CoSum Extension Reference