237           statusCode: this.statusCode,  property
248       statusCode: this.statusCode,  property
255 ServerResponse.prototype.statusCode = 200;  method in ServerResponse
338   this.writeHead(this.statusCode);
342 function writeHead(statusCode, reason, obj) {  argument
343   const originalStatusCode = statusCode;
345   statusCode |= 0;
346   if (statusCode < 100 || statusCode > 999) {
357       this.statusMessage = STATUS_CODES[statusCode] || 'unknown';
360   this.statusCode = statusCode;
397   const statusLine = `HTTP/1.1 ${statusCode} ${this.statusMessage}\r\n`;
399   if (statusCode === 204 || statusCode === 304 ||
400       (statusCode >= 100 && statusCode <= 199)) {
588         res.statusCode = 500;