ClaimQueue: StorageDescriptor<
    [],
    [
        number,
        {
            assignment: PolkadotRuntimeParachainsSchedulerCommonAssignment;
            availability_timeouts: number;
            ttl: number;
        }[],
    ][],
    false,
    never,
>

One entry for each availability core. The VecDeque represents the assignments to be scheduled on that core. The value contained here will not be valid after the end of a block. Runtime APIs should be used to determine scheduled cores for the upcoming block.