public void addAssociation(int node,int endpoint){
  if (isAssociated(node,endpoint)) {
    return;
  }
  ZWaveAssociation newAssociation=new ZWaveAssociation(node,endpoint);
  associations.add(newAssociation);
}

public void addAssociation ( int node , int endpoint ) { if ( isAssociated ( node , endpoint ) ) { return ; } ZWaveAssociation newAssociation = new ZWaveAssociation ( node , endpoint ) ; associations . add ( newAssociation ) ; }
adds an association node and endpoint
