code: public com.google.api.ads.adwords.axis.v201809.cm.WebpageParameter getParameter() {
          return parameter;
      }
docs: Gets the parameter value for this Webpage.
  
  @return parameter   * The webpage criterion parameter.
  <span class="constraint Required">This field is
  required and should not be {@code null} when it is contained within
  {@link Operator}s : ADD.</span>