class_docstr: _MultivariateOLS results class
class_docstr_tok: ["_MultivariateOLS","results","class"]
code: def _summary(self):
      raise NotImplementedError
  
imports: import numpy
  from numpy.linalg import eigvals, inv, solve, matrix_rank, pinv, svd
  from scipy import stats
  import pandas
  from patsy import DesignInfo
  from statsmodels.compat.pandas import Substitution
  from statsmodels.base.model import Model, LikelihoodModelResults
  import statsmodels.base.wrapper
  from statsmodels.regression.linear_model import RegressionResultsWrapper
  from statsmodels.iolib import summary2
  from statsmodels.tools.decorators import cache_readonly
label_desc: Use image node_id 4 for calling the _MultivariateOLSResults obj's underlying member method code with example usage: obj._summary() without return types