# File lib/serverspec/type/file.rb, line 39
    def contain(pattern, from, to)
      if pattern.is_a?(Array)
        @runner.check_file_contains_lines(@name, pattern, from, to)
      else
        if (from || to).nil?
          @runner.check_file_contains(@name, pattern)
        else
          @runner.check_file_contains_within(@name, pattern, from, to)
        end
      end
    end