[PATCH] D26373: [analyzer] Provide Contains() on ImmutableMap program state partial trait.

[Devin Coughlin via cfe-commits]

dcoughlin added a comment.

In https://reviews.llvm.org/D26373#589614, @ddcc wrote:

> Even though there isn't a performance difference, I think it is semantically clearer since it is explicit that the value is unneeded.


Makes sense to me!


https://reviews.llvm.org/D26373