Mabsten questions

Mabsten answers

• Dart Package - How to hide internal methods and classes?
• dart import and part of directives in same file
• dart:js error when calling promiseToFuture - NoSuchMethodError: tried to call a non-function, such as null: 'jsPromise.then'
• Pass command line args to npm scripts in package.json
• what do @pragma("vm:prefer-inline") mean in Flutter?