export class RelationType {
  constructor(subType: any, ownKey: any, reference: any, referencedKey: any);
  data: {
    type: string;
    subType: any;
    ownKey: any;
    referencedKey: any;
    isOptional: boolean;
  };
  reference: any;
  /**
   * @returns {RelationType}
   */
  optional(): RelationType;
  /**
   * @returns {Record<string, any>}
   */
  build(): Record<string, any>;
}
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