Make SWHID immutable and hashable.
Will be needed in the in-mem storage, as it will use SWHIDs as keys in a dict
Depends on !123 (closed) and !124 (closed).
Migrated from D3447 (view on Phabricator)
Will be needed in the in-mem storage, as it will use SWHIDs as keys in a dict
Depends on !123 (closed) and !124 (closed).
Migrated from D3447 (view on Phabricator)