Speed and influence properties to Bezier conversion

Pg. 84 of the After Effects CS6 Scripting Guide talks about the read/write availability of keyframe Speed and Influence attributes.

After Effects Developer Center | Adobe Developer Connection

The examples they show are:

//This example assumes that the Position, a spatial property, has more than two keyframes.
var easeIn = new KeyframeEase(0.5, 50);
var easeOut = new KeyframeEase(0.75, 85);
var myPositionProperty = app.project.item(1).layer(1).property("Position");
myPositionProperty.setTemporalEaseAtKey(2, [easeIn], [easeOut]);


//This example sets the Scale, a temporal property with either two or three dimensions. For 2D and 3D properties you must set an easeIn and easeOut value for each dimension:
var easeIn = new KeyframeEase(0.5, 50);
var easeOut = new KeyframeEase(0.75, 85);
var myScaleProperty = app.project.item(1).layer(1).property("Scale");
myScaleProperty.setTemporalEaseAtKey(2, [easeIn, easeIn, easeIn], [easeOut, easeOut, easeOut]);