code: def _header_table(self):
      import time
  
      model = self.model
  
      t = time.localtime()
  
      # TODO: change when we allow coef restrictions
      # ncoefs = len(model.beta)
  
      # Header information
      part1title = "Summary of Regression Results"
      part1data = [
          [model._model_type],
          ["OLS"],  # TODO: change when fit methods change
          [time.strftime("%a, %d, %b, %Y", t)],
          [time.strftime("%H:%M:%S", t)],
      ]
      part1header = None
      part1stubs = ("Model:", "Method:", "Date:", "Time:")
      part1 = SimpleTable(
          part1data,
          part1header,
          part1stubs,
          title=part1title,
          txt_fmt=self.part1_fmt,
      )
  
      return str(part1)
  
file_path: statsmodels/statsmodels/tsa/vector_ar/output.py
imports: from statsmodels.compat.python import lzip
  from io import StringIO
  import numpy
  from statsmodels.iolib import SimpleTable
label_desc: Use image node_id 4 for calling the VARSummary obj's underlying member method code with example usage: obj._header_table() and returns: str