deprecate_option(key: 'str', msg: 'str | None' = None, rkey: 'str | None' = None, removal_ver: 'str | None' = None) -> 'None'
Neither the existence of :None:None:`key` nor that if :None:None:`rkey` is checked. If they do not exist, any subsequence access will fail as usual, after the deprecation warning is given.
Name of the option to be deprecated. must be a fully-qualified option name (e.g "x.y.z.rkey").
Warning message to output when the key is referenced. if no message is given a default message will be emitted.
Name of an option to reroute access to. If specified, any referenced :None:None:`key` will be re-routed to :None:None:`rkey` including set/get/reset. rkey must be a fully-qualified option name (e.g "x.y.z.rkey"). used by the default message if no msg
is specified.
Specifies the version in which this option will be removed. used by the default message if no msg
is specified.
If the specified key has already been deprecated.
Mark option :None:None:`key` as deprecated, if code attempts to access this option, a warning will be produced, using msg
if given, or a default message if not. if :None:None:`rkey` is given, any access to the key will be re-routed to :None:None:`rkey`.
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