protected SystemMember findSystemMember(GemFireVM vm) {
    return findSystemMember(vm, true);
  }
Finds and returns the <code>SystemMember</code> that corresponds to the given
<code>GemFireVM</code> or <code>null</code> if no <code>SystemMember</code> corresponds.
geode-core/src/main/java/org/apache/geode/admin/internal/AdminDistributedSystemImpl.java