def method_missing(sym, *args, &block)
      if (data && data[sym])
        data[sym]
      else
        super(sym, *args, &block)
      end
    end
def method_missing(sym, *args, &block)
      if (data && data[sym])
        data[sym]
      else
        super(sym, *args, &block)
      end
    end
If method is missing, try to pass through to underlying data hash.