padding:

EdgeInsets

all

10.0

),

// <-- So is this

child:

Text

"Hello, World!"

),

// <-- This, too

)));

To compose layouts, both SwiftUI and Flutter nest UI components
within one another.
SwiftUI nests Views while Flutter nests Widgets.

Layout process

SwiftUI lays out views using the following process:

The parent view proposes a size to its child view.

All subsequent child views:
    
      propose a size to their child’s view
      ask that child what size it wants

Each parent view renders its child view at the returned size.

Flutter differs somewhat with its process: