code: protected void closeQuietly(Closeable closeable) {
      if (closeable == null) {
        return;
      }
      try {
        closeable.close();
      } catch (Exception t) {
        HTTP_LOGGER.warn("Unable to close {}: ", closeable, t);
      }
    }
docs: Attempts to cleanly close a resource, swallowing any exceptions that might occur since there's no way to recover
  anyway.
  <p>
  It's OK to pass {@code null} in, this method will no-op in that case.
  
  @param closeable
  The resource to close.