Provide info if each imported file contains one or multiple objects

[xenuser]

One can e.g. configure the following import source within Director (Icingaweb2):

Import source name: Hosts
Source Type: Import from files (fileshipper)
Key column name: Hostname
File format: CSV
Field delimiter: ;
Value enclosure: "
Base directory: /srv/some_dir
File name: * (all files) 

In this case, Fileshipper is used to import all files within the provided directory. Thomas writes on icinga-users:

"All files" has been implemented for scenarios where you
have one file per object, like one YAML or JSON file per single host.
This is for systems using a directory as their "inventory".

But what you can't provide in the settings is if a file contains one or multiple objects. It would be great to have the functionality that Fileshipper is able to import multiple objects per file, not only one.