xamarin - Why "removing any who's ViewModel PropertyType is an interface" when creating the MvvMCross View lookup table -

when creating default view lookup table in mvvmcross, there step "removing who's viewmodel propertytype interface". (http://slodge.blogspot.de/2013/01/overriding-view-lookup-convention-used.html) why step performed?

it's clear, can't instantiate interface, can navigate interface implementing viewmodels showviewmodel<imyviewmodel>(), if write mvx.register<imyviewmodel, myviewmodel>(). isn't view creator using di table?

when looking @ area of mvx in 2013 didn't find users wanted hide each viewmodel behind interfaces, , didn't come across users wanted navigate using interfaces.

instead users wanted:

• to navigate directly real viewmodel types
• to use interfaces grouping viewmodel's - e.g. irefreshableviewmodel groupings.

in case interfaces used groupings - e.g. irefreshableviewmodel quite common see base view class implemented - , see have irefreshableviewmodel viewmodel property. these views supposed removed in step mention.

because of this, didn't use interfaces default viewmodel navigation... , viewmodel's aren't in di/ioc/servicelocator lookup system.

however, did leave mvx open adjustment - it's in manifesto - if app wants navigate interfaces , if want views reference viewmodel interfaces instead of concrete classes, can absolutely - you'll need override setup steps put view-viewmodel lookup , viewmodel factory in place (there details on in wiki)