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[xwu (Xiaodi Wu)]

[Pre-Pitch] Import access control: a modest proposal

Over the last few years, the import statement has been collecting unofficial, unsupported features to help manage the dependencies between libraries. We (@xymus and @beccadax) are thinking about how to stabilize some of these into officially-supported language features. Chief among them is the @_implementationOnly attribute. An @_implementationOnly import is completely hidden from clients who import your module. This allows clients to import your module even if they do not have access to that m…