export declare class ExistingFormField { 'index'?: number; 'name'?: string | null; 'id'?: string | null; 'value'?: string | null; 'isReadOnly'?: boolean | null; 'templateOrder'?: number | null; static discriminator: string | undefined; static attributeTypeMap: Array<{ name: string; baseName: string; type: string; }>; static getAttributeTypeMap(): { name: string; baseName: string; type: string; }[]; }