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There is no compelling use case for this method. Recommend removal.
FWIW ... I have no idea what this is useful for either. It also seems like on many OS it might be pretty hard to actually implement.
Proposed fix (git revert + change log): https://github.com/fluffy/webrtc-w3c/commit/c5e44206c2ad8c2dd582a876707e220ac68aa00e