of<T extends BreakpointSpec> static method
Static helper to get the resolved breakpoint of type T
from the current BuildContext.
Will throw an assert error if ResponsiveBreakpointTheme<T> is not found in the ThemeData.extensions.
Implementation
static T of<T extends BreakpointSpec>(BuildContext context) {
final theme = Theme.of(context).extension<ResponsiveBreakpointTheme<T>>();
assert(
theme != null,
'ResponsiveBreakpointTheme<$T> is not added to ThemeData.extensions',
);
return theme!.resolveBreakpoint(context);
}