code: public boolean lookup(String identifier) {
  		try {
  			SPFError err = new SPFError();
  			boolean found = getService().lookup(getAccessToken(), identifier, err);
  			if (err.isOk()) {
  				return found;
  			} else {
  				handleError(err);
  				return false;
  			}
  		} catch (RemoteException e) {
  			// TODO Error Management
  			Log.d(TAG, "Remote exception while executing lookup on " + identifier, e);
  			return false;
  		}
  
  	}
docs: /*
  (non-Javadoc)
  
  @see
  it.polimi.spf.lib.async.search.SearchInterface#lookup(java.lang.String )