Example 24

Since Row won’t impose any constraints onto its children,
it’s quite possible that the children might be too big to fit
the available width of the Row. In this case, just like an
UnconstrainedBox, the Row displays the “overflow warning”.

Example 25

When a Row’s child is wrapped in an Expanded widget,
the Row won’t let this child define its own width anymore.

Instead, it defines the Expanded width according to the
other children, and only then the Expanded widget forces
the original child to have the Expanded’s width.

In other words, once you use Expanded,
the original child’s width becomes irrelevant, and is ignored.

Example 26