The array will be empty if no lists are active. Writes the latex preamble if requested. The second argument is the contents of the heading. Internal routines are described in this section. They do not form part of the public interface.
All private methods start with an underscore.
This method must be always be called to output parsed text. If UniqueLabels is true, the index entry is prefixed by the current Label and an exclamation mark. Removes latex commands from text. Can not be used with latex v2.09 or earlier. Some HTML escapes are missing and many have not been tested.