The arguments for labelRender API was wrong

[nealzhu]

The arguments for labelRenderer should have path info, but now it's not.
Seems valueRenderer has the appearance.
See here in your code.

[nealzhu]

Sorry it's document problem.
keypath is the path, but in document the demo is labelRenderer={raw => <strong>{raw}</strong>}, it shoule be labelRenderer={path => <strong>{path[0]}</strong>}