RSAKeychain.generateEC method not defined error

[ganesh1382]

while calling this method error occured as method not defined:
Error generating [TypeError: _$$_REQUIRE(_dependencyMap[3], "(...)-native").RSAKeychain.generateEC is not a function (it is undefined)]
ERROR Error generating and storing key pair: [TypeError: _$$_REQUIRE(_dependencyMap[3], "(...)-native").RSAKeychain.generateEC is not a function (it is undefined)]