code: def a_test_predict_is_nans():
      model = pf.EGARCHMReg(formula="JPM~Rf", data=data, q=2, p=2)
      x = model.fit()
      x.summary()
      assert (
          len(
              model.predict_is(h=5).values[
                  np.isnan(model.predict_is(h=5).values)
              ]
          )
          == 0
      )
  
imports: import numpy
  import pyflux
  import pandas
  from pandas.io.data import DataReader
  from datetime import datetime
label_desc: Use image node_id 13 for calling a global function with example usage: a_test_predict_is_nans() without return types