|-> (Box LibertyMeta -> Bool)|
Removes posts from the report if applying this function to the post returns False. Posts removed still affect the running balance.
Applies these post-filters to the list of posts that results from applying the predicate above. Might remove more postings. Postings removed still affect the running balance.
|-> [Box LibertyMeta]|
Adds appropriate metadata, including the running balance, to a list of Box. Because all posts are incorporated into the running balance, first calculates the running balance for all posts. Then, removes posts we're not interested in by applying the predicate and the post-filter. Finally, adds on the metadata, which will include the VisibleNum.