code: def sum_arrays(xs):
      """Element-wise sum of input arrays.
  
      Args:
          xs (tuple of ~chainer.Variable or ndarray): Input arrays to be summed.
  
      Returns:
          ~chainer.Variable: Output variable.
      """
      return SumArrays()(*xs)
  
file_path: chainerrl/chainerrl/functions/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 1 for calling a global function with example usage: sum_arrays(xs) and returns: SumArrays