import { PdfObject } from '../core/objects/pdf-object.js';
/**
 * Returns true if the given PDF object's serialized form starts with a
 * non-delimiter character, meaning it requires whitespace separation from
 * a preceding token to avoid ambiguous parsing.
 *
 * Self-delimiting types (PdfString, PdfHexadecimal, PdfArray, PdfDictionary)
 * start with `(`, `<`, `[`, or `<<` and do not need a leading space.
 */
export declare function needsCentralWhitespace(obj1?: PdfObject, obj2?: PdfObject): boolean;