/**
 * Helper to build GraphQL fields selection from fields array.
 * Supports both top-level fields (e.g., "createdOn", "id") and values fields (e.g., "values.author.name").
 * Properly merges nested fields that share common parent paths.
 *
 * @param fields - Optional array of field paths in dot notation
 * @returns GraphQL selection string with proper field nesting
 *
 * @example
 * buildFieldsSelection(["id", "entryId", "createdOn", "values.name", "values.author.name", "values.author.email"])
 * // Returns:
 * // id
 * // entryId
 * // createdOn
 * // values {
 * //   name
 * //   author {
 * //     name
 * //     email
 * //   }
 * // }
 */
export declare const buildFieldsSelection: (fields?: string[]) => string;