Inherited from Serializable
Inherited by implicit conversion any2stringadd from
Age to any2stringadd[Age]
Inherited by implicit conversion StringFormat from
Age to StringFormat[Age]
Inherited by implicit conversion Ensuring from
Age to Ensuring[Age]
Inherited by implicit conversion ArrowAssoc from
Age to ArrowAssoc[Age]
RFC 7234 section 5.1
https://developer.mozilla.org/en-US/docs/Web/HTTP/Headers/Age