def location
      st = Position.new(0, 0)
      en = Position.from_offset(code, code.length)
      range = Range.new(st, en)
      Location.new(filename, range)
    end
def location
      st = Position.new(0, 0)
      en = Position.from_offset(code, code.length)
      range = Range.new(st, en)
      Location.new(filename, range)
    end
A location representing the file in its entirety.

 @return [Location]