  x Document
   ,-[$DIR/tests/fixture/element/isindex/input.html:1:1]
 1 | <!doctype html><isindex>x</isindex>x
   : ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
   `----
  x Child
   ,-[$DIR/tests/fixture/element/isindex/input.html:1:1]
 1 | <!doctype html><isindex>x</isindex>x
   : ^^^^^^^^^^^^^^^
   `----
  x DocumentType
   ,-[$DIR/tests/fixture/element/isindex/input.html:1:1]
 1 | <!doctype html><isindex>x</isindex>x
   : ^^^^^^^^^^^^^^^
   `----
  x Child
  x Element
  x Child
   ,-[$DIR/tests/fixture/element/isindex/input.html:1:1]
 1 | <!doctype html><isindex>x</isindex>x
   :                ^^^^^^^^^^^^^^^^^^^^
   `----
  x Element
   ,-[$DIR/tests/fixture/element/isindex/input.html:1:1]
 1 | <!doctype html><isindex>x</isindex>x
   :                ^^^^^^^^^^^^^^^^^^^^
   `----
  x Child
   ,-[$DIR/tests/fixture/element/isindex/input.html:1:1]
 1 | <!doctype html><isindex>x</isindex>x
   :                         ^
   `----
  x Text
   ,-[$DIR/tests/fixture/element/isindex/input.html:1:1]
 1 | <!doctype html><isindex>x</isindex>x
   :                         ^
   `----
  x Child
   ,-[$DIR/tests/fixture/element/isindex/input.html:1:1]
 1 | <!doctype html><isindex>x</isindex>x
   :                                    ^
   `----
  x Text
   ,-[$DIR/tests/fixture/element/isindex/input.html:1:1]
 1 | <!doctype html><isindex>x</isindex>x
   :                                    ^
   `----
