def getTopCharts(type,start=nil,count=nil,extras=nil)
      method = 'getTopCharts'
      cls = TODO
      case type
      when 'Artist'
        cls = Artist
      when 'Album'
        cls = Album
      when 'Track'
        cls = Track
      when 'Playlist'
        cls = Playlist
      end
      args = {:type=>type}
      return_object cls,method,args
    end
def getTopCharts(type,start=nil,count=nil,extras=nil)
      method = 'getTopCharts'
      cls = TODO
      case type
      when 'Artist'
        cls = Artist
      when 'Album'
        cls = Album
      when 'Track'
        cls = Track
      when 'Playlist'
        cls = Playlist
      end
      args = {:type=>type}
      return_object cls,method,args
    end
Return the site-wide most popular items for a given type.