code: def forward(self, inputs, device):
      rx, ix = inputs
      ry, iy = getattr(functions, self.method)((rx, ix))
      return ry, iy
  
file_path: chainer/tests/chainer_tests/functions_tests/math_tests/test_fft.py
imports: import numpy
  from chainer import functions
  from chainer import testing
label_desc: Use image node_id 3 for calling the TestFFT obj's underlying member method code with example usage: obj.forward(inputs, device) and returns: ry,  iy