export interface EntityOptions {
    /** Database table name. Defaults to lowercase class name + 's'. */
    table?: string;
    /** Primary key column name. Defaults to 'id'. */
    primaryKey?: string;
    /**
     * Registered DataSource name. When set, the entity operates on
     * DB.source(sourceName); otherwise it operates directly on DB.
     */
    source?: string | null;
}
/**
 * Marks a class as a database entity.
 *
 * Reads the metadata accumulated by the property decorators (@Column, @HasMany, …)
 * and registers it in the EntityRepository's internal store via registerEntityMeta().
 *
 * The entity class itself is never modified — no static properties are added.
 */
export declare function Entity(options?: EntityOptions): <T extends {
    new (...args: any[]): {};
}>(EntityClass: T) => T;