Db::getTableNameForModel() 

\nn\t3::Db()->getTableNameForModel($className = NULL); 

Get table name for a model (or a model class name). Alias to \nn\t3::Obj()->getTableName()

// tx_myext_domain_model_entry
\nn\t3::Db()->getTableNameForModel( $myModel );

// tx_myext_domain_model_entry
\nn\t3::Db()->getTableNameForModel( \My\Domain\Model\Name::class );
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@param mixed $className
@return string

Source Code 

public function getTableNameForModel( $className = null )
{
	return \nn\t3::Obj()->getTableName( $className );
}
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