Function isPositioned

Returns true if parameter has x,y. Does not verify if parameter is a circle or not

import { Circles } from "https://unpkg.com/ixfx/dist/geometry.js" 

const circleA = { radius: 5 };
Circles.isPositioned(circle); // false

const circleB = { radius: 5, x: 10, y: 10 }
Circles.isPositioned(circle); // true