code: def forward(self, inputs, device):
      p, x, y = inputs
      ret = functions.linear_interpolate(p, x, y)
      ret = functions.cast(ret, numpy.float64)
      return (ret,)
  
file_path: chainer/tests/chainer_tests/functions_tests/math_tests/test_linear_interpolate.py
imports: import numpy
  from chainer import functions
  from chainer import testing
  from chainer import utils
label_desc: Use image node_id 3 for calling the TestLinearInterpolate obj's underlying member method code with example usage: obj.forward(inputs, device) and returns: ret