docstr: Returns True if the ``.cspace`` attribute is valid (either bgr/rgb/gray/hsv/hls/lab)
  Returns False, otherwise (usually happens when foreign arrays (like ndarrays) are converted to Caer Tensors).
docstr_tok: ["Returns","True","if","the","``",".cspace","``","attribute","is","valid","(","either","bgr\/rgb\/gray\/hsv\/hls\/lab",")","Returns","False",",","otherwise","(","usually","happens","when","foreign","arrays","(","like","ndarrays",")","are","converted","to","Caer","Tensors",")","."]
code: def is_null(self):
      r"""
      Returns True if the ``.cspace`` attribute is valid (either bgr/rgb/gray/hsv/hls/lab)
      Returns False, otherwise (usually happens when foreign arrays (like ndarrays) are converted to Caer Tensors).
      """
      return not self._is_valid_cspace()
  
imports: import numpy
label_desc: Use image node_id 23 for calling the _TensorBase obj's underlying member method code with example usage: obj.is_null() and returns: unknown