class CombinedCompilerPass.CallbackWrapper {
/**
* Visits the node unless the wrapped callback is inactive. Activates the
* callback if appropriate.
*/
void visitOrMaybeActivate(NodeTraversal t, Node n, Node parent) {
if (isActive()) {
callback.visit(t, n, parent);
} else if (waiting == n) {
waiting = null;
}
}
}
