code: public void unassignCompanyInDb(final JAASSystem _jaasSystem,
                                      final Company _company)
          throws EFapsException
      {
          unassignFromUserObjectInDb(CIAdminUser.Person2Company.getType(), _jaasSystem, _company);
      }
docs: The given role is unassigned for the given JAAS system from this person.
  
  @param _jaasSystem JAAS system for which the role is assigned
  @param _company the company
  @throws EFapsException on error
  @see AbstractUserObject#unassignFromUserObjectInDb(Type, JAASSystem,
  AbstractUserObject)