class_docstr: Diagnostic and specification tests and plots for Poisson model
  
  status: experimental
  
  Parameters
  ----------
  results : PoissonResults instance
code: def _init__(self, results):
      self.results = results
  
file_path: statsmodels/statsmodels/discrete/diagnostic.py
imports: import warnings
  import numpy
  from statsmodels.tools.decorators import cache_readonly
  from statsmodels.stats.diagnostic_gen import test_chisquare_binning
  from statsmodels.discrete._diagnostics_count import test_poisson_dispersion, test_poisson_zeroinflation_jh, test_poisson_zeroinflation_broek, test_poisson_zeros, test_chisquare_prob, plot_probs
label_desc: Use image node_id 1 for calling the PoissonDiagnostic obj's underlying member method code with example usage: obj._init__(results) without return types