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;
}
