code: public void setFields(com.google.api.ads.adwords.axis.v201809.cm.TemplateElementField[] fields) {
          this.fields = fields;
      }
docs: Sets the fields value for this TemplateElement.
  
  @param fields   * List of fields to use for this template element.
  These must be the same for all template ads in the
  same template ad union.
  <span class="constraint Required">This field is required
  and should not be {@code null}.</span>