Hello there, I have written proposal to allow extend standard behavior of object destructuring: https://github.com/vacuumlabs/es-proposals/blob/master/extensible-destructuring.md
Main idea is, that currently object destructuring is useless for people who use Map or Immutable.Map (https://facebook.github.io/immutable-js/) as their main data structure. This would allow authors of libraries to create map like structures that would support destructuring. It extends the language in a similar way iterator does. The main idea is, that if object defines `Symbol.get` method, it gets used to access properties of object instead of `[]` when destructuring. What do you think? Cheers, Samuel
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