Symfony console .phpstorm.meta.php file for helpers. Actual for v3.1.2.

.phpstorm.meta.php

<?php
namespace PHPSTORM_META { // we want to avoid the pollution
    /** @noinspection PhpUnusedLocalVariableInspection */
    /** @noinspection PhpIllegalArrayKeyTypeInspection */
    $STATIC_METHOD_TYPES = [
        \Symfony\Component\Console\Command\Command::getHelper('') => [
            'question' instanceof \Symfony\Component\Console\Helper\QuestionHelper,
            'process' instanceof \Symfony\Component\Console\Helper\ProcessHelper,
            'debug_formatter' instanceof \Symfony\Component\Console\Helper\DebugFormatterHelper,
            'descriptor' instanceof \Symfony\Component\Console\Helper\DescriptorHelper,
            'formatter' instanceof \Symfony\Component\Console\Helper\FormatterHelper,
            'input_aware' instanceof \Symfony\Component\Console\Helper\InputAwareHelper,
            'symfony_question' instanceof \Symfony\Component\Console\Helper\SymfonyQuestionHelper,
        ],
    ];
}