Missing `Http2ServerResponse.setHeaders()`

What is the problem this feature will solve?

Make it possible to use response.setHeaders() on both old HTTP response objects and ones coming from node:http2.

BTW I wasn't sure if this should be a "feature request" or a "bug."

What is the feature you are proposing to solve the problem?

Add the method http2.Http2ServerResponse.setHeaders() to have the same API as http.OutgoingMessage.setHeaders().

See https://nodejs.org/api/http.html#outgoingmessagesetheadersheaders.

What alternatives have you considered?

• Avoiding using setHeaders() at all.
• Monkey-patching Http2ServerResponse.
• Just writing two versions of my own set-headers code, on the assumption that, when available, setHeaders() is the most efficient option.

node:http2 Http2ServerResponse のエントリーポイントから始め、リンク先の HTTP ドキュメントを動作のリファレンスとして使用して、その API を http.OutgoingMessage.setHeaders() と比較します。完了の条件は、Http2ServerResponse が既存の HTTP レスポンスオブジェクトと同じ API と動作で setHeaders() を公開し、新しいメソッドに対する適切なカバレッジがあることです。