public boolean isRegionGroupExists(final TConsensusGroupId regionGroupId) {
    return partitionInfo.isRegionGroupExisted(regionGroupId);
  }
Check if the specified RegionGroup exists.

@param regionGroupId The specified RegionGroup
iotdb-core/confignode/src/main/java/org/apache/iotdb/confignode/manager/partition/PartitionManager.java