class Protocol::HTTP2::Client

def send_connection_preface(settings = [])
	if @state == :new
		@framer.write_connection_preface
		
		send_settings(settings)
		
		yield if block_given?
		
		read_frame do |frame|
			raise ProtocolError, "First frame must be #{SettingsFrame}, but got #{frame.class}" unless frame.is_a? SettingsFrame
		end
	else
		raise ProtocolError, "Cannot send connection preface in state #{@state}"
	end
end