/**
 * EXTRA_ARGS and the itzg `--universe` option (ADR-0002 D-1, ADR-0003 §1).
 * Pure: shared by the world assignment snapshot, the ServerSpec import and
 * setEnvKey.
 */
/**
 * Where --universe puts worlds: 'worlds' for /worlds, 'internal' for none or
 * /data (the container's working directory), undefined for anything else.
 */
export declare function universeLocation(extraArgs: string): 'worlds' | 'internal' | undefined;
/** EXTRA_ARGS without its --universe option (that is world.storage). */
export declare function withoutUniverse(extraArgs: string): string;
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