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ecc8511Fix semigroup importsJohn Ericson ef51a75Document DecidablyEmpty and add missing instancesJohn Ericson 9da0ce0Simplify itraverse{d} to not care about exact shape of newtypesJohn Ericson d0fe997Add Indexed* classes and newtype wrappers for other patch classesJohn Ericson c7e2767Extract a "patch" library from reflexJohn Ericson