code: public MapperConfig[] getDefault() {
  
          MapperConfig executionStatsMapper = new MapperConfig();
          executionStatsMapper.setMapperClass("net.anotheria.extensions.php.mappers.impl.ExecutionStatsMapper");
          executionStatsMapper.setMapperId("ExecutionStatsMapper");
  
          MapperConfig serviceStatsMapper = new MapperConfig();
          serviceStatsMapper.setMapperClass("net.anotheria.extensions.php.mappers.impl.ServiceStatsMapper");
          serviceStatsMapper.setMapperId("ServiceStatsMapper");
  
          MapperConfig counterStatsMapper = new MapperConfig();
          counterStatsMapper.setMapperClass("net.anotheria.extensions.php.mappers.impl.CounterStatsMapper");
          counterStatsMapper.setMapperId("CounterStatsMapper");
  
          return new MapperConfig[]{
                  executionStatsMapper, serviceStatsMapper, counterStatsMapper
          };
  
      }
docs: Defines builtin default mappers that required for agent proper work
  @return array of builtin mappers configurations