public RDN(Collection<AVA> avas){
  Reject.ifNull(avas);
  this.avas=validateAvas(avas.toArray(new AVA[avas.size()]));
}

public RDN ( Collection < AVA > avas ) { Reject . ifNull ( avas ) ; this . avas = validateAvas ( avas . toArray ( new AVA [ avas . size ( ) ] ) ) ; }
creates a new rdn using the provided avas .
