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    create: TxDescriptor<
        {
            cap: bigint;
            end: number;
            first_period: number;
            index: number;
            last_period: number;
            verifier?: MultiSigner;
        },
    >

    Create a new crowdloaning campaign for a parachain slot with the given lease period range.

    This applies a lock to your parachain configuration, ensuring that it cannot be changed by the parachain manager.