# File lib/ruby-prof/printers/call_stack_printer.rb, line 110
    def link(call_info)
      method = call_info.target
      file = File.expand_path(method.source_file)
      if file =~ /\/ruby_runtime$/
        h(name(call_info))
      else
        if RUBY_PLATFORM =~ /darwin/
          "<a href=\"txmt://open?url=file://#{file}&line=#{method.line}\">#{h(name(call_info))}</a>"
        else
          "<a href=\"file://#{file}##{method.line}\">#{h(name(call_info))}</a>"
        end
      end
    end