def artists_in_collection(start=nil,count=nil,sort=nil,
                              query=nil,extras=nil)
      api.getArtistsInCollection self,start,count,sort,query,extras
    end
def artists_in_collection(start=nil,count=nil,sort=nil,
                              query=nil,extras=nil)
      api.getArtistsInCollection self,start,count,sort,query,extras
    end
Get all of the artist in a user's collection.