code: def test2_normal_bbvi_mini_batch_elbo():
      """
      Tests that the ELBO increases
      """
      model = pf.GASReg(formula="y ~ x1 + x2", data=data, family=pf.t())
      x = model.fit(
          "BBVI", iterations=100, mini_batch=32, record_elbo=True
      )
      assert x.elbo_records[-1] > x.elbo_records[0]
  
imports: import numpy
  import pandas
  import pyflux
label_desc: Use image node_id 25 for calling a global function with example usage: test2_normal_bbvi_mini_batch_elbo() without return types