code: def X1(self, data):
      return data[0]
  
imports: import arviz
  import numpy
  import pytensor
  import pytensor.tensor
  import pytest
  from scipy.spatial import distance
  import pymc
label_desc: Use image node_id 3 for calling the _BaseFixtures obj's underlying member method code with example usage: obj.X1(data) and returns: data