Function: buildDefaultValues()

function buildDefaultValues(fields: {
  additionalInfo?: {
     body?: string;
     title?: string;
  };
  adoptionStatement?: string;
  allowedFonts?: string[];
  asset?: {
     alt?: string;
     fileId?: string;
     filename?: string;
     mimeType?: string;
     url?: string;
  };
  dataSource?: string;
  defaultValue?:   | string
     | {
     from: string;
     to: string | null;
   };
  description?: string;
  fields?: {
     additionalInfo?: {
        body?: string;
        title?: string;
     };
     adoptionStatement?: string;
     allowedFonts?: string[];
     asset?: {
        alt?: string;
        fileId?: string;
        filename?: string;
        mimeType?: string;
        url?: string;
     };
     dataSource?: string;
     defaultValue?:   | string
        | {
        from: string;
        to: string | null;
      };
     description?: string;
     format?: string;
     label: string;
     maxDate?: string;
     maxFiles?: number;
     maxLength?: number;
     minDate?: string;
     name: string;
     options?: (
        | string
        | {
        description?: string;
        value: string;
     })[];
     placeholder?: string;
     prefillFrom?: string;
     required: boolean;
     showRange?: boolean;
     showTime?: boolean;
     signatureMode?: "typed" | "drawn";
     timezone?: string;
     type:   | "number"
        | "date"
        | "file"
        | "email"
        | "url"
        | "select"
        | "text"
        | "checkbox"
        | "textarea"
        | "phone"
        | "radio-group"
        | "multiselect"
        | "field-array"
        | "image"
        | "file-download"
        | "section-header"
        | "section-unset"
        | "signature"
        | "signature-adopted";
  }[];
  format?: string;
  label: string;
  maxDate?: string;
  maxFiles?: number;
  maxLength?: number;
  maxRows?: number;
  minDate?: string;
  minRows?: number;
  name: string;
  options?: (
     | string
     | {
     description?: string;
     value: string;
  })[];
  placeholder?: string;
  prefillFrom?: string;
  required: boolean;
  showRange?: boolean;
  showTime?: boolean;
  signatureMode?: "typed" | "drawn";
  timezone?: string;
  type:   | "number"
     | "date"
     | "file"
     | "email"
     | "url"
     | "select"
     | "text"
     | "checkbox"
     | "textarea"
     | "phone"
     | "radio-group"
     | "multiselect"
     | "field-array"
     | "image"
     | "file-download"
     | "section-header"
     | "section-unset"
     | "signature"
     | "signature-adopted";
}[]): FormDataRecord;