class_docstr: 3D Keypoints containing Nx3 or BxNx3 points.
  
  Args:
      keypoints: Raw tensor or a list of Tensors with the Nx3 coordinates
      raise_if_not_floating_point: will raise if the Tensor isn't float
code: def data(self) -> Tensor:
      return self._data
  
imports: from typing import List, Optional, Tuple, Union, cast
  import torch
  from torch import Size
  from kornia.core import Tensor
  from kornia.geometry import transform_points
label_desc: Use image node_id 5 for calling the Keypoints3D obj's underlying member method code with example usage: obj.data() and returns: self