org-export-filter-parse-tree-functions

org-export-filter-parse-tree-functions is a variable defined in `ox.el'.
Its value is

nil

• This variable may be risky if used as a file-local variable.

Documentation:
List of functions applied to the parsed tree.
Each filter is called with three arguments: the parse tree, as
returned by `org-element-parse-buffer', the back-end, as
a symbol, and the communication channel, as a plist. It must
return the modified parse tree to transcode.