submit_report_dispute_lost: RuntimeDescriptor<
    [
        dispute_proof: {
            kind: SlashingOffenceKind;
            time_slot: { candidate_hash: FixedSizeBinary<32>; session_index: number };
            validator_id: FixedSizeBinary<32>;
            validator_index: number;
        },
        key_ownership_proof: Binary,
    ],
    boolean,
>

Submit an unsigned extrinsic to slash validators who lost a dispute about a candidate of a past session. NOTE: This function is only available since parachain host version 5.