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b580fd8Don't require Error types to have an Exception instanceAndrzej Rybczak 005c8c4Add support for GADTsAndrzej Rybczak 36b5a1fChange name to effectfulAndrzej Rybczak 8f20c15Update descriptionAndrzej Rybczak 0ce4d7dAdd README and an exampleAndrzej Rybczak