export type FrontendModelInstance = InstanceType<import("./base.js").FrontendModelClass>;
/**
 * Runs the modelsFromInput helper.
 * @param {FrontendModelInstance | FrontendModelInstance[] | null | undefined} modelOrModels - Model or models.
 * @returns {FrontendModelInstance[]} - Normalized model list.
 */
export declare function modelsFromInput(modelOrModels: FrontendModelInstance | FrontendModelInstance[] | null | undefined): FrontendModelInstance[];
/**
 * Runs the modelsDependencyKey helper.
 * @param {FrontendModelInstance | FrontendModelInstance[] | null | undefined} modelOrModels - Model or models.
 * @returns {string} - Stable dependency key.
 */
export declare function modelsDependencyKey(modelOrModels: FrontendModelInstance | FrontendModelInstance[] | null | undefined): string;
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