class_docstr: Element-wise weighted sum of input arrays.
code: def check_type_forward(self, in_types):
      type_check.expect(
          in_types[0].dtype.kind == "f",
      )
  
file_path: chainerrl/chainerrl/functions/weighted_sum_arrays.py
imports: from chainer import cuda
  from chainer import function
  from chainer import utils
  from chainer.utils import type_check
label_desc: Use image node_id 2 for calling the WeightedSumArrays obj's underlying member method code with example usage: obj.check_type_forward(in_types) without return types