code: public void setChildrenAssociationWhitelist(List<String> whitelist) {
          addField(ConfigureNodeFields.children_association_whitelist, FormField.Type.jid_multi);
          setAnswer(ConfigureNodeFields.children_association_whitelist.getFieldName(), whitelist);
      }
docs: Set the JID's in the whitelist of users that can associate child nodes with the collection
  node.  This is only relevant if {@link #getChildrenAssociationPolicy()} is set to
  {@link ChildrenAssociationPolicy#whitelist}.
  
  @param whitelist The list of JID's