How is the «checkout.cart.totals.container» implemented inside the «Summary» container on a frontend cart page?

Context: How is the «Summary» container implemented on a frontend cart page?

It contains the following blocks:

1. \Magento\Checkout\Block\Cart\Totals (checkout.cart.totals)

How is the \Magento\Checkout\Block\Cart\Totals (checkout.cart.totals) implemented inside the «Summary» container on a frontend cart page?

2. \Magento\Msrp\Block\Total (checkout.cart.totals.msrp)