Error: cannot instantiate: 'OrderedTable'

[sflennik]

I get a compiler error for the following code. Anyone know what I am doing 
wrong?
    
    
    from tables import OrderedTable, toOrderedTable
    
    proc getMetaInfo(filename: string, fileSize: int64): OrderedTable =
      result = {
        "filename": filename,
        "size": fileSize,
      }.toOrderedTable
    
    var testing = getMetaInfo("filename", 44)