pub fn add_header(self: *Response, name: []const u8, value: anytype) !void {
const header = try self.extra_headers.addOne();
try header.name.writer().writeAll(name);
pub fn add_header(self: *Response, name: []const u8, value: anytype) !void {
const header = try self.extra_headers.addOne();
try header.name.writer().writeAll(name);