google / google/closure-compiler

Object<K, V> and IObject<K, V> not compatible

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JavaScript
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Description

I was surprised when I got an error

```
ERROR - actual parameter 1 of $jscomp.owns does not match formal parameter
found : IObject
required: Object
```

Apparently `Object` doesn't actually implement `IObject`, which goes against any reasonable assumption one might make looking at these types.

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