Offset = function (circle, x, y)
{
    circle.x += x;
    circle.y += y;

    return circle;
}
Offsets the Circle by the values given.

@function Phaser.Geom.Circle.Offset
@since 3.0.0

@generic {Phaser.Geom.Circle} O - [circle,$return]

@param {Phaser.Geom.Circle} circle - The Circle to be offset (translated.)
@param {number} x - The amount to horizontally offset the Circle by.
@param {number} y - The amount to vertically offset the Circle by.

@return {Phaser.Geom.Circle} The Circle that was offset.