Imports gvisor.googlesource.com/gvisor/pkg/sleep gvisor.googlesource.com/gvisor/pkg/tcpip gvisor.googlesource.com/gvisor/pkg/tcpip/buffer gvisor.googlesource.com/gvisor/pkg/tcpip/header gvisor.googlesource.com/gvisor/pkg/tcpip/stack gvisor.googlesource.com/gvisor/pkg/waiter Standard library imports sync