Summary:
This was accidentally introduced in D25334717 (9cb16b0f31), at the time I didn't pay close attention to the impact there. The diff actually broke the CI for IGListKit in open source community since IGListDiffKit was meant to be compatible in both MacOS and iOS.
The right approach is to rely on the IGListCompatibility.h to resolve the linked code here.
Reviewed By: rzito
Differential Revision: D30344334
fbshipit-source-id: 842ca560a1bfe6d54e7d90466575e4ed35cd9b87