code: def label(self):
      return "det"
  
file_path: chainer/chainer/functions/math/det.py
imports: import chainer
  from chainer import function_node
  import chainer.functions
  from chainer.utils import precision
  from chainer.utils import type_check
label_desc: Use image node_id 1 for calling the BatchDet obj's underlying member method code with example usage: obj.label() and returns: str