code: def _resid_info(self):
      buf = StringIO()
      names = self.model.names
  
      buf.write("Correlation matrix of residuals" + "\n")
      buf.write(
          pprint_matrix(self.model.resid_corr, names, names) + "\n"
      )
  
      return buf.getvalue()
  
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 7 for calling the VARSummary obj's underlying member method code with example usage: obj._resid_info() and returns: buf