code: def guard_transform(transform):
      """Return an Affine transformation instance."""
      if not isinstance(transform, Affine):
          if tastes_like_gdal(transform):
              raise TypeError(
                  "GDAL-style transforms have been deprecated.  This "
                  "exception will be raised for a period of time to highlight "
                  "potentially confusing errors, but will eventually be removed."
              )
          else:
              transform = Affine(*transform)
      return transform
  
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 3 for calling a global function with example usage: guard_transform(transform) and returns: transform