def getTracksForArtistInCollection(artist,user=nil,extras=nil)
      method = 'getTracksForArtistInCollection'
      type = Track
      args = {:artist=>artist}
      args[:user] = user if user
      args[:extras] = extras if extras
      return_object type,method,args
    end
def getTracksForArtistInCollection(artist,user=nil,extras=nil)
      method = 'getTracksForArtistInCollection'
      type = Track
      args = {:artist=>artist}
      args[:user] = user if user
      args[:extras] = extras if extras
      return_object type,method,args
    end
Which tracks from the given artist are in the user's collection.