MDL-77027 webservice: Add missing class requires

admin/webservice/documentation.php

@@ -23,6 +23,9 @@
  * @license   http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
  * @author Jerome Mouneyrac
  */
+
+use core_external\external_api;
+
 require_once('../../config.php');
 require_once($CFG->libdir . '/adminlib.php');
 require_once($CFG->dirroot . '/webservice/lib.php');

webservice/renderer.php

@@ -14,6 +14,9 @@
 // You should have received a copy of the GNU General Public License
 // along with Moodle.  If not, see <http://www.gnu.org/licenses/>.
 
+use core_external\external_api;
+use core_external\external_multiple_structure;
+use core_external\external_single_structure;
 
 /**
  * Web service documentation renderer.