lib/process/convert/elements/animation/dataAttributes/extendedKeys/keyframing.js
function addPreservationFrameAt(time, value, delay, array)
{
	addFrameAt(time, value, delay, array);
}
function addPreservationFrameAt(time, value, delay, array)
{
	addFrameAt(time, value, delay, array);
}
/*
Insert extra keyframe to preserve frame-by-frame (keyframing) effect,
because CSS is spec'ed to attempt "tweening" on all properties, even those that cannot be,
undesirably resulting in changes occuring immediately instead of on the following keyframe