code: public java.util.List<ExtraParam> getExtraParams() {
          if (extraParams == null) {
              extraParams = new com.amazonaws.internal.SdkInternalList<ExtraParam>();
          }
          return extraParams;
      }
docs: <p>
  A list of name-value pairs for parameters required by certain top-level domains.
  </p>
  
  @return A list of name-value pairs for parameters required by certain top-level domains.