export type SceneSourceFailure = 'source_not_ready' | 'needs_permission' | 'source_rate_limited' | 'source_timeout';
/** A source failure is separate from a model execution failure. */
export declare class SceneSourceNotReady extends Error {
    readonly reason: SceneSourceFailure;
    constructor(reason?: SceneSourceFailure);
}
export declare function sceneSourceFailureReason(error: unknown): SceneSourceFailure;