docs: function ValidationJob(options, context, taskId) {
          ValidationJob.super_.call(this, logger, options, context, taskId);
          assert.string(this.context.target);
          this.nodeId = this.context.target;
          assert.ok(options.users || this.context.users);
          this.timeout = options.timeout || 20000;
          this.retries = options.retries || 2;
          this.backoffDelay = options.backoffDelay || 1000;
          this.users = _.compact([].concat(options.users).concat(this.context.users));
      }