How have the principles of habeas corpus been interpreted in federal and state courts?

Twitty v. Smith, 614 F.2d 325, 331 (2d Cir. 1979). These principles are designed to "ensure that the federal courts not intrude upon state proceedings unless and until the state courts have been given a fair opportunity to consider and act upon the claims on which the habeas corpus petition is based." Id. They have no less applicability when the claim is not one explicitly asserted by the prisoner but is seen by the federal court as implicit.