code: public java.util.List<String> getAllowedValues() {
          if (allowedValues == null) {
              allowedValues = new com.amazonaws.internal.SdkInternalList<String>();
          }
          return allowedValues;
      }
docs: <p>
  A list of values that are permitted for a parameter.
  </p>
  
  @return A list of values that are permitted for a parameter.