@VisibleForTesting
  void setMembersMap(Map<InternalDistributedMember, Future<RemoteApplicationVM>> membersMap) {
    synchronized (membersLock) {
      this.membersMap = membersMap;
    }
  }
Cancels any pending joins that match the member id.
geode-core/src/main/java/org/apache/geode/internal/admin/remote/RemoteGfManagerAgent.java