What is the test for liability under the natural and probable consequences doctrine?

crime. The latter question is not whether the aider and abettor actually foresaw the additional crime, but whether, judged objectively, it was reasonably foreseeable. [Citation.]' [Citation.] Liability under the natural and probable consequences doctrine 'is measured by whether a reasonable person in the defendant's position would have or should have known that the charged offense was a reasonably foreseeable consequence of the act aided and abetted.' [Citation.]" (People v. Medina (2009) 46 Cal.4th 913, 920.)