Using PHP API

Ibexa\CorporateAccount\CompanyService::getCompany(int)

it's possible to load without errors a Content item which is not a Company. It crashes later on when trying to access Company-specific data.
The issue with that is that it's enough to load company using getCompany to be able to delete it via CompanyService::deleteCompany(Company).

This makes it high priority bug for REST as it's quite easy to input wrong ID using REST
DELETE /corporate/companies/{companyId} endpoint.

Actual behavior

It's possible to load and delete any Content using Corporate Account Companies PHP API.

Expected behavior

When trying to load (and thus also delete) a Content item which is not a Company, a PHP API InvalidArgumentException should be thrown.