code: def test_drivers_bwd_compat():
      with rasterio.Env() as m:
          assert driver_count() > 0
          assert type(m) == rasterio.Env
      assert driver_count() > 0
  
imports: import logging
  import rasterio
  from rasterio._env import driver_count
label_desc: Use image node_id 2 for calling a global function with example usage: test_drivers_bwd_compat() without return types