remote_api/client.go
func (c *Client) NewContext(parent context.Context) context.Context {
	ctx := internal.WithCallOverride(parent, c.call)
	ctx = internal.WithLogOverride(ctx, c.logf)
	ctx = internal.WithAppIDOverride(ctx, c.appID)
	return ctx
}
func (c *Client) NewContext(parent context.Context) context.Context {
	ctx := internal.WithCallOverride(parent, c.call)
	ctx = internal.WithLogOverride(ctx, c.logf)
	ctx = internal.WithAppIDOverride(ctx, c.appID)
	return ctx
}
// NewContext returns a copy of parent that will cause App Engine API
// calls to be sent to the client's remote host.