X-jquery-tmp- i do not see.. in twitter api results in console chrome, how it works?

JavaScript
1 

<script id="tmpl-tweet" type="text/x-jquery-tmpl">
      <li>
        <a class="avatar" href="http://twitter.com/${from_user}"><img src="${profile_image_url}" alt="${from_user}"></a>
        <a href="http://twitter.com/${from_user}"><h2>${from_user}</h2></a>
        <span class="details">
          ${text}
        </span>
      </li>
    </script>

<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.7.1/jquery.min.js"></script>
<script src="jquery.tmpl.min.js"></script>

Although works above and give results, i do not see
from_user
in twitter api results in console chrome, how it works?