5EUʍactive_supportEUʍactive_support/message_verifierEUʍEUʍUʍEUʍencodeUʍUʍ EUʍdecodeEUʍGlobalIDEUʍ ActiveSupportEUʍMessageVerifierEUʍVerifierEUʍBase64EUʍdataEUʍurlsafe_encode64EUʍurlsafe_decode64EUʍprivateEUʍcore#define_methodEUʍrequire : T v   + E a  ; V |