callable here. The callable is passed the ParserOptions object and the option
name.
+'ParserOutputPostCacheTransform': Called from ParserOutput::getText() to do
+post-cache transforms.
+$parserOutput: The ParserOutput object.
+&$text: The text being transformed, before core transformations are done.
+&$options: The options array being used for the transformation.
+
'ParserSectionCreate': Called each time the parser creates a document section
from wikitext. Use this to apply per-section modifications to HTML (like
wrapping the section in a DIV). Caveat: DIVs are valid wikitext, and a DIV