module ActionDispatch::Session::LegacySupport

def self.included(klass)
  [
    :get_session,
    :get_session_model,
    :write_session,
    :delete_session,
    :find_session
  ].each do |m|
    klass.send(:alias_method, "#{m}_rails5".to_sym, m)
    klass.send(:remove_method, m)
  end
end