export declare const IS_WHITESPACE_REGEX: RegExp;
/**
 * Check if a given text is whitespace(s).
 */
export declare function isWhitespace(s: string): boolean;
export declare const STARTS_WITH_WHITESPACE_REGEX: RegExp;
export declare const HAS_LINE_BREAK_REGEX: RegExp;
export declare const GLOBAL_LINE_BREAK_REGEX: RegExp;
/**
 * Check if a given text contains line break(s).
 */
export declare function hasLineBreak(s: string): boolean;
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