code: def _add_relu(self, x1, x2):
      x = paddle.add(x=x1, y=x2)
      x = F.relu(x)
      return x
  
imports: from __future__ import absolute_import
  from __future__ import division
  from __future__ import print_function
  import paddle
  from paddle import nn
  import paddle.nn.functional
  from paddle import ParamAttr
label_desc: Use image node_id 2 for calling the FPN_Up_Fusion obj's underlying member method code with example usage: obj._add_relu(x1, x2) and returns: x