How to use the @popmotion/popcorn.velocityPerSecond function in @popmotion/popcorn

getVelocity() {
        // This could be isFloat(this.prev) && isFloat(this.current), but that would be wasteful
        return this.canTrackVelocity
            ? // These casts could be avoided if parseFloat would be typed better
              velocityPerSecond(
                  parseFloat(this.current as any) -
                      parseFloat(this.prev as any),
                  this.timeDelta
              )
            : 0
    }