protected SystemMemberCache createSystemMemberCache(GemFireVM vm)
      throws org.apache.geode.admin.AdminException {
    return new SystemMemberCacheImpl(vm);
  }
Template method for creating {@link SystemMemberCache}.

@param vm the GemFire vm to retrieve cache info from
@return new impl instance of {@link SystemMemberCache}
geode-core/src/main/java/org/apache/geode/admin/internal/SystemMemberImpl.java