docs: @XmlElement(name = "displayedValue")
      @JsonProperty(value = "displayedValue")
      @ApiModelProperty(value = "The displayed value (normally the page size plus one).", position = 1)
      public String getDisplayedValue() {
          if (StringUtils.isBlank(displayedValue)) {
              return Integer.toString(value + 1);
          }
          return displayedValue;
      }