code: protected String getParentOrganizationalUnit(String fqn) {
  
          String ouFqn = CmsOrganizationalUnit.getParentFqn(CmsOrganizationalUnit.removeLeadingSeparator(fqn));
          if (ouFqn == null) {
              ouFqn = "";
          }
          return ouFqn;
      }
docs: Returns the organizational unit for the parent of the given fully qualified name.<p>
  
  @param fqn the fully qualified name to get the parent organizational unit for
  
  @return the parent organizational unit for the fully qualified name