Obj::isModel() 

\nn\t3::Obj()->isModel($obj); 

Checks whether the object is a domain model.

\nn\t3::Obj()->isModel( $obj );
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| @return boolean

Source Code 

public function isModel ( $obj )
{
	if (!is_object($obj) || is_string($obj)) return false;
	return is_a($obj, \TYPO3\CMS\Extbase\DomainObject\AbstractEntity::class);
}
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