ToRaw

Target for implicit conversions to Header.Raw from modelled headers and key-value pairs.

A method taking variadic ToRaw arguments will allow taking heterogeneous arguments, provided they are either:

• A value of type A which has a Header[A] in scope
• A (name, value) pair of String, which is treated as a Recurring header
• A Header.Raw
• A Foldable (List, Option, etc) of the above.