src/main/java/com/spotify/dns/ChangeNotifiers.java
public static <T> RunnableChangeNotifier<T> direct(Supplier<Set<T>> recordsSupplier) {
    return new DirectChangeNotifier<T>(recordsSupplier);
  }
public static <T> RunnableChangeNotifier<T> direct(Supplier<Set<T>> recordsSupplier) {
    return new DirectChangeNotifier<T>(recordsSupplier);
  }
Create a {@link RunnableChangeNotifier} that directly wraps a set of records given by a
{@link Supplier}.

<p>Each call to {@link Runnable#run()} will cause the supplier to be polled and regular
change notifications to be triggered.

<p>This implementation is useful for testing components that depend on a
{@link ChangeNotifier}.

@param recordsSupplier  The supplier of records
@param <T>              The record type
@return A runnable notifier