code: def _is_identity_matrix(
      matrix: skimage.transform.ProjectiveTransform,
  ) -> bool:
      return np.allclose(matrix.params, np.eye(3, dtype=np.float32))
  
imports: import math
  from typing import List, Optional, Sequence, Tuple, Union
  import cv2
  import numpy
  import skimage.transform
  from scipy.ndimage import gaussian_filter
  from albumentations.augmentations.utils import _maybe_process_in_chunks, angle_2pi_range, clipped, preserve_channel_dim, preserve_shape
  from ...None import random_utils
  from ...core.bbox_utils import denormalize_bbox, normalize_bbox
  from ...core.transforms_interface import BoxInternalType, FillValueType, ImageColorType, KeypointInternalType
label_desc: Use image node_id 21 for calling a global function with example usage: _is_identity_matrix(matrix) and returns: np