code: public Set<String> getCollectors() {
  		final Set<String> collectors = new HashSet<String>();
  		final Testcases testcases = data.getTestcases();
  		for (final TestcaseType tct : testcases.getTestcase()) {
  			for (final Datacollector collector : tct.getDatacollector()) {
  				collectors.add(collector.getName());
  			}
  		}
  		return collectors;
  	}
docs: Returns all datacollectors that are used in the resultfile.
  
  @return Names of all datacollectors