@Override
  public Object clone() throws CloneNotSupportedException {
    // Since all fields are immutable objects, no deep cloning is
    // necessary.
    ManagedEntityConfigImpl clone = (ManagedEntityConfigImpl) super.clone();
    clone.entity = null;
    return clone;
  }
Validates this configuration.

@throws IllegalStateException If this config is not valid
geode-core/src/main/java/org/apache/geode/admin/internal/ManagedEntityConfigImpl.java