Rotate = function (line, angle)
{
    var x = (line.x1 + line.x2) / 2;
    var y = (line.y1 + line.y2) / 2;

    return RotateAroundXY(line, x, y, angle);
}
Rotate a line around its midpoint by the given angle in radians.

@function Phaser.Geom.Line.Rotate
@since 3.0.0

@generic {Phaser.Geom.Line} O - [line,$return]

@param {Phaser.Geom.Line} line - The line to rotate.
@param {number} angle - The angle of rotation in radians.

@return {Phaser.Geom.Line} The rotated line.