TextStyle bold24Roboto = const TextStyle(
  color: Colors.white,
  fontSize: 24,
  fontWeight: FontWeight.bold,
);

How is react-style, or declarative, programming different from the
  traditional imperative style?
  For a comparison, see Introduction to declarative UI.

Performing basic layout operations

The following examples show how to perform the most common UI layout tasks.

Styling and aligning text

Font style, size, and other text attributes that CSS
handles with the font and color properties are individual
properties of a TextStyle child of a Text widget.

For text-align property in CSS that is used for aligning text,
there is a textAlign property of a Text widget.

In both HTML and Flutter, child elements or widgets
are anchored at the top left, by default.

font: 900 24px Georgia;
}