static public function make_(
		string $url
	,
		string $method
	,
		array  $request_transformer_meta
	,
		array  $response_transformer_meta
	,
		string $request_content_type
	,
		string $response_content_type= null
	):self
	{
		return new static(
			$url
		,
			$method
		,
			Transformer::make_( $request_transformer_meta )
		,
			Transformer::make_( $response_transformer_meta )
		,
			$request_content_type
		,
			$response_content_type??$request_content_type
		);
	}