type net/http.writeRequest

4 uses

	net/http (current package)
		transport.go#L1561: 		writech:       make(chan writeRequest, 1),
		transport.go#L1879: 	writech   chan writeRequest   // written by roundTrip; read by writeLoop
		transport.go#L2484: type writeRequest struct {
		transport.go#L2591: 	pc.writech <- writeRequest{req, writeErrCh, continueCh}