code: def start_params(self):
      # Add three new loading parameters to the end of the parameter
      # vector, initialized to zeros (for simplicity; they could
      # be initialized any way you like)
      return np.r_[super().start_params, 0, 0, 0]
  
file_path: statsmodels/examples/python/statespace_dfm_coincident.py
imports: import numpy
  import pandas
  import statsmodels.api
  import matplotlib.pyplot
  from pandas_datareader.data import DataReader
  from statsmodels.tsa.statespace import tools
label_desc: Use image node_id 2 for calling the ExtendedDFM obj's underlying member method code with example usage: obj.start_params() and returns: np