/**
 * @internal
 */
export declare function convertSimple2RegExpPattern(pattern: string): string;
/**
 * @internal
 */
export declare function isLowerAsciiLetter(code: number): boolean;
/**
 * @internal
 */
export declare function isUpperAsciiLetter(code: number): boolean;
/**
 * @internal
 */
export declare function equalsIgnoreCase(a: string, b: string): boolean;
/**
 * @internal
 */
export declare function startsWithIgnoreCase(str: string, candidate: string): boolean;
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