Elastica\Type\Mapping::disableSource PHP Method

    public function disableSource($enabled = false)
    {
        return $this->setSource(['enabled' => $enabled]);
    }

 /**
  * @group functional
  */
 public function testMappingStoreFields()
 {
     $client = $this->_getClient();
     $index = $client->getIndex('test');
     $index->create(array(), true);
     $type = $index->getType('test');
     $mapping = new Mapping($type, array('firstname' => array('type' => 'string', 'store' => true), 'lastname' => array('type' => 'string')));
     $mapping->disableSource();
     $type->setMapping($mapping);
     $firstname = 'Nicolas';
     $doc = new Document(1, array('firstname' => $firstname, 'lastname' => 'Ruflin'));
     $type->addDocument($doc);
     $index->refresh();
     $queryString = new QueryString('ruflin');
     $query = Query::create($queryString);
     $query->setFields(array('*'));
     $resultSet = $type->search($query);
     $result = $resultSet->current();
     $fields = $result->getFields();
     $this->assertEquals($firstname, $fields['firstname'][0]);
     $this->assertArrayNotHasKey('lastname', $fields);
     $this->assertEquals(1, count($fields));
     $index->flush();
     $document = $type->getDocument(1);
     $this->assertEmpty($document->getData());
     $index->delete();
 }