class_docstr: Clipped Rectifier Unit gradient function.
code: def forward_gpu(self, inputs):
      (gy,) = inputs
      gx = cuda.elementwise(
          "T x, T gy, T z",
          "T gx",
          "gx = ((x > 0) & (x < z)) ? gy : (T)0",
          "clipped_relu_bwd",
      )(self.x, gy, self.cap)
      return (gx,)
  
imports: import numpy
  import chainer
  from chainer.backends import cuda
  from chainer import function_node
  from chainer import utils
  from chainer.utils import type_check
  import chainerx
label_desc: Use image node_id 4 for calling the ClippedReLUGrad2 obj's underlying member method code with example usage: obj.forward_gpu(inputs) and returns: gx