code: function TemplateRequest(env, title, oldid, opts) {
  	ApiRequest.call(this, env, title);
  	// IMPORTANT: Set queueKey to the 'title'
  	// since TemplateHandler uses it for recording listeners
  	this.queueKey = title;
  	this.reqType = "Template Fetch";
  	opts = opts || {}; // optional extra arguments
  
  	var apiargs = {
  		format: 'json',
  		// XXX: should use formatversion=2
  		action: 'query',
  		prop: 'info|revisions',
  		rawcontinue: 1,
  		// all revision properties which parsoid is interested in.
  		rvprop: 'content|ids|timestamp|size|sha1|contentmodel',
  		rvslots: 'main',
  	};
  
  	if (oldid) {
  		this.oldid = oldid;
  		apiargs.revids = oldid;
  	} else {
  		apiargs.titles = title;
  	}
  
  	this.requestOptions = {
  		method: 'GET',
  		followRedirect: true,
  		uri: env.conf.wiki.apiURI,
  		qs: apiargs,
  		timeout: env.conf.parsoid.timeouts.mwApi.srcFetch,
  	};
  
  	this.request(this.requestOptions);
  }
docs: Template fetch request helper class.
  
  @class
  @extends ~ApiRequest
  @param {MWParserEnvironment} env
  @param {string} title The template (or really, page) we should fetch from the wiki.
  @param {string} oldid The revision ID you want to get, defaults to "latest revision".