LinearBorderEdge constructor
Defines one side of a LinearBorder.
The values of size and alignment must be between 0.0 and 1.0, and -1.0 and 1.0 respectively.
Implementation
const LinearBorderEdge({
this.size = 1.0,
this.alignment = 0.0,
}) : assert(size >= 0.0 && size <= 1.0);