Accessor
Open a collector zip file as if it was a directory - automatically expand sparse files.
Open an offline collector zip file as if it was a directory. This
is similar to the zip accessor (see below) but it automatically
decrypts collections protected using the x509 scheme. Use this
accessor to transparently read inside encrypted collections.
This accessor also automatically expands sparse files by zero padding them (when possible - if zero padding is unreasonable large for this file, we do not expand it).