isStationary property
When true, signals that this button does not animate its layout bounds during normal display (i.e. it is stationary at rest, like an extra button anchored inside a compound tab bar).
Stationary buttons retain their BackdropFilter blur even under
GlassQuality.minimal, matching the visual appearance of the surrounding
bar surface. Generic interactive buttons default to false, which omits
the blur in minimal mode to avoid compositor flicker caused by
continuously changing spring-animated bounds.
Defaults to false — existing behaviour is preserved.
Implementation
final bool isStationary;