src/vs/workbench/api/common/extHostTypes.ts/ColorInformation/constructor
class ColorInformation:	constructor(range: Range, color: Color) {
		if (color && !(color instanceof Color)) {
			throw illegalArgument('color');
		}
		if (!Range.isRange(range) || range.isEmpty) {
			throw illegalArgument('range');
		}
		this.range = range;
		this.color = color;
	}