template/brain.go
func (b *Brain) Forget(d dep.Dependency) {
	b.Lock()
	defer b.Unlock()

	delete(b.data, d.String())
	delete(b.receivedData, d.String())
}
func (b *Brain) Forget(d dep.Dependency) {
	b.Lock()
	defer b.Unlock()

	delete(b.data, d.String())
	delete(b.receivedData, d.String())
}
// Forget accepts a dependency and removes all associated data with this
// dependency. It also resets the "receivedData" internal map.