-HtmlFile:ImplicitSections.html
 -body
  -[section]
   h5
  h4
  -h3
   -hh4
    hh5
   -h4 h3
    hh4
   hh3
   hh6
   hhh6
   hhh5
   -g4
    g6
  g3
  g2
 -body2
  body3
 -null
  -null
   hhh2
  hhh1