code: def _is_rgb_image(tens):
      # tens = to_tensor(tens)
      # return tens.is_rgb()
      return len(tens.shape) == 3 and tens.shape[-1] == 3
  
file_path: caer/caer/color/_rgb.py
imports: import cv2
  from ..coreten import Tensor, to_tensor
  from ._constants import RGB2BGR, RGB2GRAY, RGB2HSV, RGB2LAB, RGB2HLS, RGB2YUV, RGB2LUV
label_desc: Use image node_id 1 for calling a global function with example usage: _is_rgb_image(tens) and returns: unknown