GetMidPoint = function (line, out)
{
    if (out === undefined) { out = new Point(); }

    out.x = (line.x1 + line.x2) / 2;
    out.y = (line.y1 + line.y2) / 2;

    return out;
}
Get the midpoint of the given line.

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

@generic {Phaser.Geom.Point} O - [out,$return]

@param {Phaser.Geom.Line} line - The line to get the midpoint of.
@param {(Phaser.Geom.Point|object)} [out] - An optional point object to store the midpoint in.

@return {(Phaser.Geom.Point|object)} The midpoint of the Line.