copy method
Copies value of all the properties from the source
to
this PointLight.
Implementation
@override
PointLight copy(Object3D source, [bool? recursive]) {
super.copy.call(source);
PointLight source1 = source as PointLight;
distance = source1.distance;
decay = source1.decay;
shadow = source1.shadow!.clone();
return this;
}