contentPadding property

EdgeInsetsGeometry contentPadding
final

Padding around the content.

If there is no content, no padding will be provided. Otherwise, padding of 20 pixels is provided above the content to separate the content from the title, and padding of 24 pixels is provided on the left, right, and bottom to separate the content from the other edges of the dialog.

Implementation 

final EdgeInsetsGeometry contentPadding