public boolean performGuardedChange(Runnable change) { checkValid(); assert !myChangeGuard : "already in change"; myEditor.getDocument().startGuardedBlockChecking(); myChangeGuard = true; boolean result; try { result = myOffsets.performGuardedChange(change); } finally { myEditor.getDocument().stopGuardedBlockChecking(); myChangeGuard = false; } if (!result || myDisposed) { hide(); return false; } if (isVisible()) { HintManagerImpl.updateLocation(this, myEditor, myUi.calculatePosition().getLocation()); } checkValid(); return true; }