code: def forward(self, inputs, device):
      x, W = inputs
      y = functions.prelu(x, W)
      return (y,)
  
file_path: chainer/tests/chainer_tests/functions_tests/activation_tests/test_prelu.py
imports: import numpy
  import chainer
  from chainer import functions
  from chainer import testing
label_desc: Use image node_id 4 for calling the TestPReLU obj's underlying member method code with example usage: obj.forward(inputs, device) and returns: y