IGPAPI
    Preparing search index...

    Variable MediaCommentsSheetOptionsSchemaConst

    MediaCommentsSheetOptionsSchema: Struct<
        { commentSessionId: optionalKey<String> },
    > = ...

    How a sheet is opened: the composer's session id when the caller declares one (a scene declares the recording's; absent, the sheet generates a fresh id). It is the sheet's input, not a per-comment value.