How is the complement of «شاء» recovered in «فلو شاء لهداكم أجمعين»?

Reasons for Omitting the Object: Context, Economy, and Scope

• From the case of «لو» alone
• Solely from the plural «أجمعين»
• Because the verb of willing becomes inherently intransitive
• From the conditional consequence «لهداكم»