Construct a rounded backing with a shadow. This existed before UICorner existed, and remains for backwards compatability with games that still leverage this. Note that the dropshadow created by this is still impossible to recreate with a UICorner, so this provides some utility.
npm install @quenty/roundedbackingbuilder --save
Usage is designed to be simple.
Initializes a new RoundedBackingBuilder
Only top two corners are rounded
Only bottom two corners are rounded