code: public java.util.List<String> getStringSetValue() {
          if (stringSetValue == null) {
              stringSetValue = new com.amazonaws.internal.SdkInternalList<String>();
          }
          return stringSetValue;
      }
docs: <p>
  When the <code>stringSetValue</code> type is set, the value of the resource must be a string type.
  </p>
  
  @return When the <code>stringSetValue</code> type is set, the value of the resource must be a string type.