adoptStateFrom method
Implementation
void adoptStateFrom(ParticleSpoilerDrawer other) {
_particles
..clear()
..addAll(other._particles);
_maxParticleSize = other._maxParticleSize;
_particleColor = other._particleColor;
_particleSpeed = other._particleSpeed;
_shapePath = other._shapePath;
onParticlesInitialized();
}