private void deleteStoreIfExists() throws Exception {
    HelixStoreOperator storeOperator = new HelixStoreOperator(getMockHelixStore(storeConfig));
    // check if the store exists by checking if root path (e.g., "/") exists in the store.
    if (storeOperator.exist("/")) {
      storeOperator.delete("/");
    }
  }
Delete corresponding {@code ZooKeeper} nodes of a {@link HelixPropertyStore} if exist.
@throws InterruptedException
ambry-commons/src/test/java/com/github/ambry/commons/HelixNotifierTest.java