@dxos/app-framework - v0.16.0
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    Variable ContributionTypeIdConst

    ContributionTypeId: unique symbol = ...

    Brand symbol carried by every Contribution. Exported only so the manager layer (CapabilityManager.isContribution) can detect contributions at runtime — not part of the plugin-authoring API. Not tagged internal: stripInternal would drop it from the declarations while the Contribution brand still names it.