What is the common law doctrine of transferred intent in the context of the doctrine of self-defense?

Under the common law doctrine of transferred intent, "one's criminal intent follows the corresponding criminal act to its unintended consequences. . . . [T]he reasoning applies equally to carry the lack of criminal intent to the unintended consequences and thus preclude criminal responsibility." (People v. Matthews (1979) 91 Cal.App.3d 1018, 1023 (Matthews), italics omitted.) Accordingly, "the doctrine of self-defense is available to insulate one from criminal responsibility where his act, justifiably in self-defense, inadvertently results in the injury of an innocent bystander." (Id. at p. 1024.)