docstr: Generate HTML Summary Table
          
docstr_tok: ["Generate","HTML","Summary","Table"]
code: def as_html(self):
      """Generate HTML Summary Table"""
  
      tables = self.tables
      settings = self.settings
  
      simple_tables = _simple_tables(tables, settings)
      tab = [x.as_html() for x in simple_tables]
      tab = "\n".join(tab)
  
      temp_txt = [st.replace("\n", "<br/>\n") for st in self.extra_txt]
      txt = "<br/>\n".join(temp_txt)
  
      out = "<br/>\n".join([tab, txt])
  
      return out
  
imports: from statsmodels.compat.pandas import FUTURE_STACK
  from statsmodels.compat.python import lzip
  import datetime
  from functools import reduce
  import re
  import textwrap
  import numpy
  import pandas
  from .table import SimpleTable
  from .tableformatting import fmt_latex, fmt_txt
label_desc: Use image node_id 13 for calling the Summary obj's underlying member method code with example usage: obj.as_html() and returns: out