code: def __init__(
      self, first_part: Function, second_part: Function
  ) -> None:
      MeanFunction.__init__(self)
      self.add_1 = first_part
      self.add_2 = second_part
  
imports: from typing import Collection, Optional, Sequence, Tuple
  import numpy
  import tensorflow
  from check_shapes import check_shape
  from check_shapes import check_shapes, inherit_check_shapes
  from .base import Module, Parameter, TensorType
  from .config import default_float, default_int
label_desc: Use image node_id 1 to create a new Additive object from inherited base classes: MeanFunction, Function with example: obj = Additive(first_part, second_part)