import type { MetaData } from "@metaobjectsdev/metadata";
export interface TphSubtype {
    /** The discriminator field NAME (declared on the base via `@discriminator`). */
    field: string;
    /** This subtype's discriminator VALUE (declared via `@discriminatorValue`). */
    value: string;
}
/**
 * If `entity` is a TPH subtype, return its discriminator field + value; else
 * null. A subtype declares `@discriminatorValue` and inherits `@discriminator`
 * from an ancestor in its resolved super chain.
 */
export declare function tphSubtypeOf(entity: MetaData): TphSubtype | null;
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