public static function provideProxiedExprMethods()
{
$expression = new Expr();
$expression->field('dayOfMonth')->dayOfMonth('$dateField')->field('dayOfWeek')->dayOfWeek('$dateField');
return ['avg()' => ['avg', ['$field']], 'max()' => ['max', ['$field']], 'min()' => ['min', ['$field']], 'stdDevPop()' => ['stdDevPop', ['$field']], 'stdDevSamp()' => ['stdDevSamp', ['$field']], 'sum()' => ['sum', ['$field']]];
}