Add this code block into the phpdoc of Craft's WebApp.php class.
This will enable PHP Storm IDE features for services like craft()->market_product->method()
* @property Market_AddressService $market_address
* @property Market_CartService $market_cart
* @property Market_CountryService $market_country
* @property Market_CustomerService $market_customer
* @property Market_DiscountService $market_discount
* @property Market_EmailService $market_email
* @property Market_GatewayService $market_gateway
* @property Market_LineItemService $market_lineItem
* @property Market_OrderAdjustmentService $market_orderAdjustment
* @property Market_OrderHistoryService $market_orderHistory
* @property Market_OrderService $market_order
* @property Market_OrderSettingsService $market_orderSettings
* @property Market_OrderStatusService $market_orderStatus
* @property Market_PaymentMethodService $market_paymentMethod
* @property Market_PaymentService $market_payment
* @property Market_ProductService $market_product
* @property Market_ProductTypeService $market_productType
* @property Market_SaleService $market_sale
* @property Market_SeedService $market_seed
* @property Market_SettingsService $market_settings
* @property Market_ShippingMethodService $market_shippingMethod
* @property Market_ShippingRuleService $market_shippingRule
* @property Market_StateService $market_state
* @property Market_TaxCategoryService $market_taxCategory
* @property Market_TaxRateService $market_taxRate
* @property Market_TaxZoneService $market_taxZone
* @property Market_TransactionService $market_transaction
* @property Market_VariantService $market_variant