Drupal 8編程 - 如何利用程式碼創造Entity

$array = array (
	'nid' => '45',	// can designate node id
	'type' => 'article',
	'title' => 'article title',
	'uid' => '1',	// author
	'promote' => '1',	// promoted to front page
	'sticky' => '0',	// Sticky at top of lists
	'status' => '0',	// 0: unpublished, 1: publish
	'created' => '1483228800',	// timestamp
	'changed' => '1483228800',	// timestamp
	'body' => array(
		array(
			'value' => 'text',
			'summary' => 'summary of body',
			'format' => 'full_html',
		),
	),
	'field_tags' => array('1', '2', '3'),	// taxonomy term id
	'revision_timestamp' => '1483228800',	// timestamp
	'revision_uid' => '1',	// who create this revision
	'revision_log' => 'revision log',	// revision log message
);
$object = $this->entityTypeManager()->getStorage('node')->create($array);
$this->entityTypeManager()->getStorage('node')->save($object);

$object = $this->entityTypeManager()->getStorage('node')->load(intval('45'));
$object->setNewRevision();
$object->setRevisionCreationTime('1483228800');
$object->setRevisionAuthorId(1);
$object->setRevisionLogMessage('revision log');
$object->setTitle('article title');
$object->setCreatedTime('1483228800');
$object->setChangedTime('1483228800');
$object->setPublished(false);
//$object->setPublished(true);
$object->set('body', array(
	'value' => 'text',
	'summary' => 'summary of body',
	'format' => 'full_html',
));
$object->set('field_tags', array('1', '2', '3'));
$this->entityTypeManager()->getStorage('node')->save($object);

$array = array (
	'comment_type' => 'comment',
	'pid' => array(),
	'entity_id' => array('45'),
	'subject' => 'subject',
	'uid' => '0',	// comment from unregistered user
	'name' => 'name',
	'mail' => 'example@example.com',
	'homepage' => 'http://www.example.com',
	'hostname' => '192.168.0.1',
	'created' => array('1483228800'),
	'changed' => '1483228800',
	'status' => '1',
	'entity_type' => 'node',
	'field_name' => 'comment',
	'comment_body' => array(
		'value' => 'text',
		'format' => 'basic_html',
	),
);
$object = $this->entityTypeManager()->getStorage('comment')->create($array);
$this->entityTypeManager()->getStorage('comment')->save($object);

$array = array(
	'uid' => '1',
	'status' => '1',
	'filename' => 'image01.jpg',
	'uri' => 'public://inline-images/image01.jpg',
	'filemime' => 'image/jpeg',
	'filesize' => '20000',
	'created' => '1483228800',
	'changed' => '1483228800',
);
$object = $this->entityTypeManager()->getStorage('file')->create($array);
$this->entityTypeManager()->getStorage('file')->save($object);