code: def __init__(self):
      x, y, z = scalars("xyz")
      e = x * y
      op = OpFromGraph([x, y], [e])
      e2 = op(x, y) + z
      op2 = OpFromGraph([x, y, z], [e2])
      e3 = op2(x, y, z) + z
  
      self.inputs = [x, y, z]
      self.outputs = [e3]
  
file_path: pytensor/tests/d3viz/models.py
imports: import numpy
  import pytensor.tensor
  from pytensor import shared
  from pytensor.compile.builders import OpFromGraph
  from pytensor.tensor.special import softmax
  from pytensor.tensor.type import dmatrix, scalars
label_desc: Use image node_id 1 to create a new OfgNested object  with example: obj = OfgNested()