opacity property
double
get
opacity
Node opacity in the range [0,1].
Expected to be finite.
Runtime behavior: values are normalized at assignment (!finite -> 1,
clamped to [0,1]); JSON serialization rejects invalid values.
Implementation
double get opacity => _opacity;
set
opacity
(double value)
Implementation
set opacity(double value) => _opacity = clamp01Finite(value);