Copyright 2017 The Go Authors. All rights reserved. Use of this source code is governed by a BSD-style license that can be found in the LICENSE file.
go:build go1.9 +build go1.9

package context

import  // standard library's context, as of Go 1.7
A Context carries a deadline, a cancelation signal, and other values across API boundaries. Context's methods may be called by multiple goroutines simultaneously.
A CancelFunc tells an operation to abandon its work. A CancelFunc does not wait for the work to stop. After the first call, subsequent calls to a CancelFunc do nothing.