code: @XmlElement(name = "totalSize", required = true)
      @JsonProperty(value = "totalSize", required = true)
      @ApiModelProperty(value = "The total size of available elements.", position = 2, required = true)
      @Override
      public long getTotalSize() {
          return totalSize;
      }
docs: Returns the size of all available elements.
  
  @return the size of all available elements