plugins/markdown/test/data/structureView/headersLadder.txt

-headersLadder.md
 [h6]
 h5
 h4
 h3
 h2
 -h1
  -h2
   -h3
    -h4
     -h5
      h6
     h5
    h4
   h3
  h2
 -h1
  -h2
   -h3
    -h4
     -h5
      h6