header line appender
class MyHttpResponse : HttpResponse { protected override addHeaders ( AppendHeaderLines append ) { // append "Hello: World!\r\n" append("Hello", "World!"); } }
If the header field value of a header line needs to be assembled incrementally, the AppendHeaderLines.IncrementalValue may be used; see the documentation of that class below for further information.
Called by render() when a subclass may use append to add its response header lines.