public void addReturnAttribute(CoreTokenField field){
  Reject.ifNull(field);
  returnFields.add(field);
}

public void addReturnAttribute ( CoreTokenField field ) { Reject . ifNull ( field ) ; returnFields . add ( field ) ; }
assigns an attribute to be part of the return attributes . when a return attribute is provided , the return results of the query will only populate the indicated return attributes . the default is for all attributes to be returned , unless the query constrains the results using this function .
