ReflectAngle = function (lineA, lineB)
{
    return (2 * NormalAngle(lineB) - Math.PI - Angle(lineA));
}
Calculate the reflected angle between two lines.

This is the outgoing angle based on the angle of Line 1 and the normalAngle of Line 2.

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

@param {Phaser.Geom.Line} lineA - The first line.
@param {Phaser.Geom.Line} lineB - The second line.

@return {number} The reflected angle between each line.