private RegionServerRpcQuotaManager getRpcQuotaManager() {
    return server.getRegionServerRpcQuotaManager();
  }
Find the List of HRegions based on a list of region specifiers
@param regionSpecifiers the list of region specifiers
@return the corresponding list of regions
@throws IOException if any of the specifiers is not null, but failed to find the region
hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/RSRpcServices.java