/**
* Returns a newly created Piwik_DataTable_Array.
* The future elements of this array should be indexed by their dates (we set the index name to 'date').
*
* @return Piwik_DataTable_Array
*/
protected function getNewDataTableArray()
{
$table = new Piwik_DataTable_Array();
$table->setNameKey('date');
return $table;
}
