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    bond_extra_other: TxDescriptor<
        { extra: NominationPoolsBondExtra; member: MultiAddress },
    >

    origin bonds funds from extra for some pool member member into their respective pools.

    origin can bond extra funds from free balance or pending rewards when origin == other.

    In the case of origin != other, origin can only bond extra pending rewards of other members assuming set_claim_permission for the given member is PermissionlessCompound or PermissionlessAll.