Participants collection - disable method has(), because hasParticipantsOfSurvey() should be used to verify if there are participants of given survey

src/Result/Collection/Participants.php

@@ -40,6 +40,14 @@ class Participants extends Collection
         throw new DisabledMethodException(__METHOD__, 'addParticipants');
     }
 
+    /**
+     * {@inheritdoc}
+     */
+    public function has($element)
+    {
+        throw new DisabledMethodException(__METHOD__, 'hasParticipantsOfSurvey');
+    }
+
     /**
      * Adds participants of given survey
      *

tests/Result/Collection/ParticipantsTest.php

@@ -61,6 +61,12 @@ class ParticipantsTest extends BaseTestCase
         (new Participants())->addMultiple([]);
     }
 
+    public function testHas()
+    {
+        $this->expectException(DisabledMethodException::class);
+        (new Participants())->has(new Participant());
+    }
+
     public function testAddParticipantsWithoutParticipants()
     {
         $surveyId = 1;