code: public XcapResponse get(URI uri, Header[] additionalRequestHeaders,
  			Credentials credentials) throws IOException {
  		checkState();
  		return ra.getClient().get(uri, additionalRequestHeaders, credentials);
  	}
docs: /*
  (non-Javadoc)
  
  @see XcapClient#get(java.net.URI,
  Header[],
  Credentials)