code: def check_type_forward(self, in_types):
      type_check.expect(in_types.size() == 1)
      type_check.expect(in_types[0].dtype.kind == "f")
  
file_path: chainer/chainer/functions/math/log_ndtr.py
imports: import numpy
  from chainer.backends import cuda
  from chainer import function_node
  from chainer.functions.math import erfcx
  from chainer import utils
  from chainer.utils import type_check
label_desc: Use image node_id 2 for calling the LogNdtr obj's underlying member method code with example usage: obj.check_type_forward(in_types) without return types