code: def _filter_supported_drivers():
      global supported_drivers
  
      with Env() as gdalenv:
          ogrdrv_names = gdalenv.drivers().keys()
          supported_drivers_copy = supported_drivers.copy()
          for drv in supported_drivers.keys():
              if drv not in ogrdrv_names:
                  del supported_drivers_copy[drv]
  
      supported_drivers = supported_drivers_copy
  
file_path: Fiona/fiona/drvsupport.py
imports: import os
  from fiona.env import Env
  from fiona._env import get_gdal_version_tuple
label_desc: Use image node_id 2 for calling a global function with example usage: _filter_supported_drivers() without return types