BGP "import table"

[Lutz Preßler]

Hello,

https://bird.network.cz/?get_doc&v=20&f=bird-6.html#bgp-import-table states

  import table switch

A BGP import table contains all received routes from given BGP neighbor, before application of import filters. It is also called Adj-RIB-In in BGP terminology. BIRD BGP by default operates without import tables, in which case received routes are just processed by import filters, accepted ones are stored in the master table, and the rest is forgotten. Enabling import table allows to store unprocessed routes, which can be examined later by show route, and can be used to reconfigure import filters without full route refresh. Default: off.

(and following "export table").

Haven't checked the filter reconfiguration/rpki_reload aspect of the feature
or looked into that part of the code yet.
But I cannot find a way with 2.0.8 to "examime by show route unprocessed routes".

What do I miss? Regards,
  Lutz Preßler (SerNet GmbH)