code: def a_test_bbvi_elbo():
      model = pf.EGARCHMReg(formula="JPM~Rf", data=data, p=1, q=1)
      x = model.fit(
          "BBVI", iterations=300, map_start=False, record_elbo=True
      )
      assert x.elbo_records[-1] > x.elbo_records[0]
  
imports: import numpy
  import pyflux
  import pandas
  from pandas.io.data import DataReader
  from datetime import datetime
label_desc: Use image node_id 5 for calling a global function with example usage: a_test_bbvi_elbo() without return types