public Builder addTargetElements(Element... additionalTargets){
  for (int i=0; i < additionalTargets.length; i++) {
    targetElements.add(additionalTargets[i]);
  }
  return this;
}

public Builder addTargetElements ( Element ... additionalTargets ) { for ( int i = 0 ; i < additionalTargets . length ; i ++ ) { targetElements . add ( additionalTargets [ i ] ) ; } return this ; }
adds additional target elements . if the user hovers over any of the target elements , the tooltip will appear .
