class Aws::Stubbing::Protocols::RpcV2

def stub_error(error_code)
  resp = Seahorse::Client::Http::Response.new
  resp.status_code = 400
  resp.body = Aws::RpcV2.encode(
    {
      'code' => error_code,
      'message' => 'stubbed-response-error-message'
    }
  )
  resp
end