Class: restore_decode_content - X-Ref
Helper class in charge of providing the contents to be processed by restore_decode_rules
This class is in charge of looking (in DB) for the contents needing to be
processed by the declared restore_decode_rules. Basically it iterates over
one recordset (optimised by joining them with backup_ids records), retrieving
them from DB, delegating process to the restore_plan and storing results back
to DB.
Implements one visitor-like pattern so the decode_processor will visit it
to get all the contents processed by its defined rules
TODO: Complete phpdocs