code: def extensions(driver):
      """Returns file extensions supported by driver
  
      Parameters
      ----------
      driver : str
  
      Returns
      -------
      list
          List with file extensions or None if not specified by driver
  
      """
  
      exts = _get_metadata_item(driver, MetadataItem.EXTENSIONS)
  
      if exts is None:
          return None
  
      return [ext for ext in exts.split(" ") if len(ext) > 0]
  
file_path: Fiona/fiona/meta.py
imports: import logging
  import xml.etree.ElementTree
  from fiona.env import require_gdal_version
  from fiona.ogrext import _get_metadata_item
label_desc: Use image node_id 6 for calling a global function with example usage: extensions(driver) and returns: unknown, None