function Op(fn, len, val) {
        /**
         * Function to call.
         * @type {function(Uint8Array, number, *)}
         */
        this.fn = fn;

        /**
         * Value byte length.
         * @type {number}
         */
        this.len = len;

        /**
         * Next operation.
         * @type {Writer.Op|undefined}
         */
        this.next = undefined;

        /**
         * Value to write.
         * @type {*}
         */
        this.val = val; // type varies
      }
/**
       * Constructs a new writer operation instance.
       * @classdesc Scheduled writer operation.
       * @constructor
       * @param {function(*, Uint8Array, number)} fn Function to call
       * @param {number} len Value byte length
       * @param {*} val Value to write
       * @ignore
       */
Constructs a new writer operation instance.
@classdesc Scheduled writer operation.
Constructs a new writer operation instance . @classdesc Scheduled writer operation .
function Op(fn, len, val) {
        this.fn = fn;
        this.len = len;
        this.next = undefined;
        this.val = val; 
      }
function Op ( fn , len , val ) { this . fn = fn ; this . len = len ; this . next = undefined ; this . val = val ; }
Constructs a new writer operation instance.
Constructs a new writer operation instance .
/**
         * Function to call.
         * @type {function(Uint8Array, number, *)}
         */ /**
         * Value byte length.
         * @type {number}
         */ /**
         * Next operation.
         * @type {Writer.Op|undefined}
         */ /**
         * Value to write.
         * @type {*}
         */ // type varies