context/context.go
func WithContext(ctx context.Context) goprocess.Process {
	p := goprocess.WithParent(goprocess.Background())
	CloseAfterContext(p, ctx)
	return p
}
func WithContext(ctx context.Context) goprocess.Process {
	p := goprocess.WithParent(goprocess.Background())
	CloseAfterContext(p, ctx)
	return p
}
// WithContext constructs and returns a Process that respects
// given context. It is the equivalent of:
//
//   func ProcessWithContext(ctx context.Context) goprocess.Process {
//     p := goprocess.WithParent(goprocess.Background())
//     CloseAfterContext(p, ctx)
//     return p
//   }
//