* value of set or collection but not both.
   */
  protected final Set<E> getSet() {
    return (Set<E>) collection;
  }

      assertThrows(NullPointerException.class, () -> cache.getUnchecked(null));
      checkEmpty(cache);
    }
  }

  /* ---------------- Key Set -------------- */

  public void testKeySet_nullToArray() {
    for (LoadingCache<Object, Object> cache : caches()) {
      Set<Object> keys = cache.asMap().keySet();
      assertThrows(NullPointerException.class, () -> keys.toArray((Object[]) null));
      checkEmpty(cache);
    }

      assertThrows(NullPointerException.class, () -> cache.getUnchecked(null));
      checkEmpty(cache);
    }
  }

  /* ---------------- Key Set -------------- */

  public void testKeySet_nullToArray() {
    for (LoadingCache<Object, Object> cache : caches()) {
      Set<Object> keys = cache.asMap().keySet();
      assertThrows(NullPointerException.class, () -> keys.toArray((Object[]) null));
      checkEmpty(cache);
    }

     * @return A <code>boolean</code> indicating whether the flag is set.
     */
    public boolean getFlag ( int flag ) {
        return ( getFlags() & flag ) != 0;
    }


    /**
     * Sets or clears the specified flag.
     * 
     * @param flag
     *            The flag to set/clear (i.e.,
     *            <code>NTLMSSP_NEGOTIATE_OEM</code>).
     * @param value

export MINIO_ROOT_USER=minio
export MINIO_ROOT_PASSWORD=minio123
export MINIO_POLICY_PLUGIN_URL=http://localhost:8080/
minio server /tmp/disk{1...4}
```

Now, let's test it out with `mc`:

```sh
mc alias set myminio http://localhost:9000 minio minio123
mc ls myminio
mc mb myminio/test
mc cp /etc/issue myminio/test
mc admin user add myminio foo foobar123
export MC_HOST_foo=http://foo:foobar123@localhost:9000
mc ls foo

import com.google.common.annotations.GwtCompatible;
import java.lang.annotation.Inherited;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.util.Collection;
import java.util.Set;
import org.checkerframework.checker.nullness.qual.Nullable;

/**
 * When describing the features of the collection produced by a given generator (i.e. in a call to
 * {@link

	{"(1<<63)/0", "divide of value with high bit set"},
	{"3%0", "modulo by zero"},
	{"(1<<63)%0", "modulo of value with high bit set"},
	{"3<<-4", "negative left shift count"},
	{"3<<(1<<63)", "negative left shift count"},
	{"3>>-4", "negative right shift count"},
	{"3>>(1<<63)", "negative right shift count"},
	{"(1<<63)>>2", "right shift of value with high bit set"},
	{"(1<<62)>>2", ""},

  }

  @Override
  public Set<E> inEdges(N node) {
    return nodeInvalidatableSet(checkedConnections(node).inEdges(), node);
  }

  @Override
  public Set<E> outEdges(N node) {
    return nodeInvalidatableSet(checkedConnections(node).outEdges(), node);
  }

  @Override
  public Set<N> predecessors(N node) {

  }

  @Override
  public Set<E> inEdges(N node) {
    return nodeInvalidatableSet(checkedConnections(node).inEdges(), node);
  }

  @Override
  public Set<E> outEdges(N node) {
    return nodeInvalidatableSet(checkedConnections(node).outEdges(), node);
  }

  @Override
  public Set<N> predecessors(N node) {

		return true
	}

	return false
}

func (set *erasureObjects) listObjectsToRebalance(ctx context.Context, bucketName string, fn func(entry metaCacheEntry)) error {
	disks, _ := set.getOnlineDisksWithHealing(false)
	if len(disks) == 0 {
		return fmt.Errorf("no online drives found for set with endpoints %s", set.getEndpoints())
	}

	// However many we ask, versions must exist on ~50%