code: def model_unnamed_observed_node():
      """
      Model at the source of the following issue: https://github.com/pymc-devs/pymc/issues/5892
      """
      data = [-1, 0, 0.5, 1]
  
      with pm.Model() as model:
          mu = pm.Normal(name="mu", mu=0.0, sigma=5.0)
          y = pm.Normal(name="y", mu=mu, sigma=3.0, observed=data)
  
      compute_graph = {
          "mu": set(),
          "y": {"mu"},
      }
      plates = {
          "": {"mu"},
          "4": {"y"},
      }
  
      return model, compute_graph, plates
  
imports: import warnings
  import numpy
  import pytensor
  import pytensor.tensor
  import pytest
  from pytensor.compile.sharedvalue import SharedVariable
  from pytensor.tensor.variable import TensorConstant
  import pymc
  from pymc.exceptions import ImputationWarning
  from pymc.model_graph import ModelGraph, model_to_graphviz, model_to_networkx
label_desc: Use image node_id 5 for calling a global function with example usage: model_unnamed_observed_node() and returns: model,  compute_graph,  plates