Defines how far the title is inset from either the widget's bottom-left or its center.
Typically this property is used to adjust how far the title is inset from the bottom-left and it is specified along with centerTitle false.
By default the value of this property is
EdgeInsetsDirectional.only(start: 72, bottom: 16) if the title is
EdgeInsetsDirectional.only(start: 0, bottom: 16) otherwise.
final EdgeInsetsGeometry? titlePadding;