public static InternalDistributedSystem getAnyInstance() {
    List l = existingSystems;
    if (l.isEmpty()) {
      return null;
    } else {
      return (InternalDistributedSystem) l.get(0);
    }
  }
Returns any existing <code>InternalDistributedSystem</code> instance. Returns <code>null</code>
if no instance exists.
geode-core/src/main/java/org/apache/geode/distributed/internal/InternalDistributedSystem.java