.idがidenitityを提供するということを示すmixinモジュールの名前どれが良いか

identity.rb

# 1
class Coriander
  include MyApp::Entity::HasId
end

# 2
class Coriander
  include MyApp::Entity::Identifiable
end

# 3
class Coriander
  include MyApp::Entity::Equatable
end

# 4
class Coriander
  include MyApp::Entity::Unique
end