object If-None-Match
The "If-None-Match" header field makes the request method conditional
on a recipient cache or origin server either not having any current
representation of the target resource, when the field-value is "*",
or having a selected representation with an entity-tag that does not
match any of those listed in the field-value.
From RFC-7232
- Companion
- class
trait Product
trait Mirror
class Object
trait Matchable
class Any