code: public MasterSlaveRuleConfiguration loadMasterSlaveRuleConfiguration(final String shardingSchemaName) {
          return new MasterSlaveRuleConfigurationYamlSwapper().swap(YamlEngine.unmarshal(regCenter.getDirectly(configNode.getRulePath(shardingSchemaName)), YamlMasterSlaveRuleConfiguration.class));
      }
docs: Load master-slave rule configuration.
  
  @param shardingSchemaName sharding schema name
  @return master-slave rule configuration