code: public java.util.List<String> getIpGroupIds() {
          if (ipGroupIds == null) {
              ipGroupIds = new com.amazonaws.internal.SdkInternalList<String>();
          }
          return ipGroupIds;
      }
docs: <p>
  The identifiers of the IP access control groups associated with the directory.
  </p>
  
  @return The identifiers of the IP access control groups associated with the directory.