/**
* Iterates HTML/ARIA space-separated tokens without treating Unicode whitespace as a delimiter.
* A bounded caller can charge each inspected code unit before any complete token is sliced.
*/
export declare function asciiWhitespaceTokens(value:string|null,consumeCodeUnit?:()=>boolean):Generator<string>;
/** Whether a value can be represented as one IDREF token in a serialized ARIA relationship. */
export declare function isSingleAsciiWhitespaceToken(value:string):boolean;