code: def __exit__(self, *args):
      self.close()
      self._env.close()
  
imports: from contextlib import ExitStack
  from functools import partial
  import math
  import numpy
  import warnings
  from affine import Affine
  from rasterio.env import env_ctx_if_needed
  from rasterio._transform import _transform_from_gcps, RPCTransformerBase, GCPTransformerBase
  from rasterio.enums import TransformDirection, TransformMethod
  from rasterio.control import GroundControlPoint
  from rasterio.rpc import RPC
  from rasterio.errors import TransformError, RasterioDeprecationWarning
label_desc: Use image node_id 4 for calling the GDALTransformerBase obj's underlying member method code with example usage: obj.__exit__() without return types