/**
 * Ensures that all shards in the range exist on the DSN, then runs a shell
 * script (presumably DB migration), and then optionally activates the shards.
 */
export declare function allocate({ dsns, from, to, migrateCmd, activate, }: {
    dsns: string[];
    from: number;
    to: number;
    migrateCmd: string;
    activate: boolean;
}): Promise<void>;
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