import type { ContentTypeProps } from 'contentful-management';
export type AddTargetFieldOk = {
    ok: true;
};
export type AddTargetFieldErr = {
    ok: false;
    message: string;
};
export type AddTargetFieldResult = AddTargetFieldOk | AddTargetFieldErr;
/**
 * `add` may only append into Entry-link **array** fields (content, contents, topContent, …).
 * Singular links (e.g. component.visual) must use `set <ref> <field> <id> --link`.
 */
export declare function assertAddTargetIsEntryLinkArray(parentCt: ContentTypeProps, targetField: string): AddTargetFieldResult;
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