code: public void putIfNoneMatch(URI uri, String eTag, String mimetype,
  			String content, Header[] additionalRequestHeaders,
  			Credentials credentials) {
  		ra.getExecutorService().execute(
  				new AsyncPutIfNoneMatchStringContentHandler(ra, handle, uri,
  						eTag, mimetype, content, additionalRequestHeaders,
  						credentials));
  	}
docs: /*
  (non-Javadoc)
  
  @see
  AsyncActivity#putIfNoneMatch(java
  .net.URI, java.lang.String, java.lang.String, java.lang.String,
  Header[],
  Credentials)