code: public Versions getVersions(String versionsURL, String authorizationToken) {
  
  		LOG.info("getVersions with token: " + authorizationToken);
  
  		VersionsResponse versionsResponse = (VersionsResponse) doRequest(new HttpGet(versionsURL), authorizationToken,
  				VersionsResponse.class);
  		return new Versions(versionsResponse.data);
  	}
docs: getVersions
  
  @param versionsURL
  @param authorizationToken
  @return Versions