# File lib/rcov/code_coverage_analyzer.rb, line 89
    def data(filename)
      raw_data = raw_data_relative
      update_script_lines__
      unless @script_lines__.has_key?(filename) && 
             raw_data.has_key?(filename)
        return nil 
      end
      refine_coverage_info(@script_lines__[filename], raw_data[filename])
    end