docstr: The initial parameter value (if specified, None otherwise)
code: def initial_value(self) -> Optional[Tensor]:
      """
      The initial parameter value (if specified, None otherwise)
      """
      return self._initial_value
  
imports: from __future__ import annotations
  import math
  from typing import Optional
  import torch
  from torch import sigmoid, Tensor
  from torch.nn import Module
  from ..utils.transforms import _get_inv_param_transform, inv_sigmoid, inv_softplus
label_desc: Use image node_id 10 for calling the Interval obj's underlying member method code with example usage: obj.initial_value() and returns: self