How to use the boom.gatewayTimeout function in boom

export function promiseTimeout(ms: number, promise: Promise): Promise {
  const boom = Boom.gatewayTimeout('Timed out in ' + ms + 'ms.');
  // @ts-ignore
  boom.isTimeout = true;

  if (ms > 0) {
    // Create a promise that rejects in 

const id = setTimeout(() => {
      clearTimeout(id);
      const boom = Boom.gatewayTimeout('Timed out in ' + ms + 'ms.');
      // @ts-ignore
      boom.isTimeout = true;
      reject(boom);
    }, ms);
  });

formatResponse: function(error, Log) {
    try {
      var response = {};
      if (error.type) {
        switch (error.type) {
          case this.types.BAD_IMPLEMENTATION:
            response = Boom.badImplementation(error.message);
            break;
          case this.types.GATEWAY_TIMEOUT:
            response = Boom.gatewayTimeout(error.message);
            break;
          case this.types.NOT_FOUND:
            response = Boom.notFound(error.message);
            break;
          case this.types.BAD_REQUEST:
            response = Boom.badRequest(error.message);
            break;
          case this.types.CONFLICT:
            response = Boom.conflict(error.message);
            break;
          default:
            response = Boom.badRequest(error.message);
        }
      }
      else if (error.isBoom) {
        response = error

.catch(function (error) {
          Log.error(error);
          return reply(Boom.gatewayTimeout('An error occurred.'));
        });
    };

}).catch(function (error) {
          Log.error(error);
          reply(Boom.gatewayTimeout("There was a database error while retrieving the owner resource."));
        });
      }

timeoutId = setTimeout(function () {

            return finish(Boom.gatewayTimeout('Client request timeout'));
        }, options.timeout);
    }

setTimeout(() => {
      if (!req.aborted && !req.socket) req.abort();
      if (!resolved) {
        timeoutReject(Boom.gatewayTimeout('Client request timeout'));
      } else {
        timeoutResolve();
      }
    }, timeout);
  });

.catch(function (error) {
                Log.error('sending welcome email failed:', error);
                return reply(Boom.gatewayTimeout('Sending registration email failed.'));
              });
          }

let params=ctx.request.body
  let options={
      url:params.url,
      screenshot:params.screenshot,
      html:params.html,
      style:params.style,
      script:params.script,
      waitFor:params.waitFor,
      device:params.device
  }
  if(!(options=checkOption(options,ctx))) return
  ctx.type = options.screenshot.type;
  try{
      ctx.body=await instance.getImage(options)
  }catch (e) {
      ctx.body=Boom.gatewayTimeout(e.message||'Service Unavailable').output;
  }
}

x:ctx.query.x,
        y:ctx.query.y,
        width:ctx.query.w,
        height:ctx.query.h,
      },
      omitBackground:ctx.query.o
    },
    waitFor:ctx.query.waitFor,
    device:ctx.query.device
  }
  if(!(options=checkOption(options,ctx))) return
  ctx.type = options.screenshot.type;
  try{
    ctx.body=await instance.getImage(options)
  }catch (e) {
    ctx.body=Boom.gatewayTimeout(e.message||'Service Unavailable').output;
  }
}