message: Calculated duration for shared element motion
  Duration can be a function. Want the evaluated value so used the
  current state and data to get the value
diff: @@ -106,7 +106,8 @@ class NavigationMotion extends React.Component {
  ))}
  {sharedElementMotion && sharedElementMotion({
  sharedElements: !this.state.rest ? this.getSharedElements() : [],
  - duration, easing
  + duration: this.getPropValue(duration, stateContext.state, stateContext.data),
  + easing: this.getPropValue(easing, stateContext.state, stateContext.data)
  })}
  </div>
  )}
  