Wesley Wigham 66fa9f6cd7
Just map type variables to constraints at certain positions for narrowing so that we do not map primitives (#21384)
* Use a limited version of getApparentType that doesnt map primitives

* Reuse [most of]  getBaseConstraintOfType, since it does the needed behaviors

* Move new function next to the very similar function
2018-02-21 12:51:26 -08:00
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2018-02-14 09:20:13 -08:00