Method getAppUsage() is missing from the npm package

[c-dima]

When installing from npm, getAppUsage is missing and nowhere to be found in the compiled source code, but when checking the source on github, it can be found inside src/fb.js folder.
NodeJS can run ES6 natively so I'm wondering, why does the npm package contain only the compiled ES5 code?
One quick fix is to install the library directly from github (add the github url directly to package.json), but this is a bit weird as the package is on npm.

[dantman]

• getAppUsage is part of the 2.1.0 milestone and hasn't been published to npm which is currently 2.0.0
• This library actually uses a number of es7 and unstandardized stage-0 features that NodeJS can't run. NodeJS, also doesn't yet implement all es6 features such as imports. So the code still needs to be transpiled.
• Most of the es6 features NodeJS implemented were added in 6.x, this library is compatible back to NodeJS 4.x which was relatively new when 2.0.0 was started. I'll consider updating the minimum NodeJS version to 6.10.x and updating the babel target to 6 when there's a reason to publish a 3.0.0 with breaking changes

[gobengo]

@c-dima I published a version with getAppUsage (latest master branch here) as 'fb2' until the owner of 'fb' gets around to it. http://npm.im/fb2 (source: https://github.com/gobengo/facebook-node-sdk). It works fine in node 7.6.0.