export declare function IsNull(stringToCheck: string | undefined): boolean;
export declare function IsNotNull(stringToCheck: string | undefined): boolean;
export declare function IsEmpty(stringToCheck: string | undefined): stringToCheck is "";
export declare function IsNotEmpty(stringToCheck: string | undefined): boolean;
export declare function IsNullOrEmpty(stringToCheck: string | undefined): boolean;
export declare function IsNotNullOrEmpty(stringToCheck: string | undefined): boolean;
export declare function IsNullOrEmptyOrWhiteSpace(stringToCheck: string | undefined): boolean;
export declare function IsNotNullOrEmptyOrWhiteSpace(stringToCheck: string | undefined): boolean;
export declare function CamelCaseToHumanText(camelCase: string | undefined): string | null;
export declare function RemoveTrailingComma(stringToCheck: string): string;
export declare function ToLowerCase(stringToCheck: string): string;
export declare function Includes(stringToCheck: string, valueToCheck: string): boolean;
export declare function NotIncludes(stringToCheck: string, valueToCheck: string): boolean;
export declare function AbbreviateString(stringToAbbreviate: string, maxLength: number): string;
export declare function CapitaliseFirstLetter(str: string): string;
export declare function Humanize(str: string): string;
export declare function ReplaceEmptySpacesWithUnderscore(str?: string): string;
export declare function IsNumeric(str: string): boolean;
export declare function UnescapeHtmlEntities(str: string): string;
export declare function ReplaceAllOccurencesExceptLastOne(str: string, searchTerm: string, replacement: string): string;
/**
 * Splits a string into words: handles camelCase, PascalCase, UPPER_CASE,
 * UPPER_SNAKE_CASE, snake_case, kebab-case, spaces, and dot.notation.
 * Shared helper used by `kebabCase`, `startCase`, and `sentenceCase`.
 */
export declare function words(str: string): string[];
/**
 * Converts string to kebab-case.
 * Drop-in replacement for lodash/kebabCase.
 */
export declare function kebabCase(string: string): string;
/**
 * Converts string to Start Case.
 * Drop-in replacement for lodash/startCase.
 */
export declare function startCase(string: string): string;
/**
 * Converts string to Sentence case.
 * Splits on camelCase, PascalCase, dots, underscores, hyphens, and non-alphanumeric characters.
 * Drop-in replacement for the sentence-case package.
 */
export declare function sentenceCase(input: string): string;
export declare const StringExtensions: {
    IsNull: typeof IsNull;
    IsNotNull: typeof IsNotNull;
    IsEmpty: typeof IsEmpty;
    IsNotEmpty: typeof IsNotEmpty;
    IsNullOrEmpty: typeof IsNullOrEmpty;
    IsNotNullOrEmpty: typeof IsNotNullOrEmpty;
    IsNullOrEmptyOrWhiteSpace: typeof IsNullOrEmptyOrWhiteSpace;
    IsNotNullOrEmptyOrWhiteSpace: typeof IsNotNullOrEmptyOrWhiteSpace;
    CamelCaseToHumanText: typeof CamelCaseToHumanText;
    RemoveTrailingComma: typeof RemoveTrailingComma;
    ToLowerCase: typeof ToLowerCase;
    Includes: typeof Includes;
    NotIncludes: typeof NotIncludes;
    AbbreviateString: typeof AbbreviateString;
    CapitaliseFirstLetter: typeof CapitaliseFirstLetter;
    Humanize: typeof Humanize;
    ReplaceEmptySpacesWithUnderscore: typeof ReplaceEmptySpacesWithUnderscore;
    IsNumeric: typeof IsNumeric;
    UnescapeHtmlEntities: typeof UnescapeHtmlEntities;
    ReplaceAllOccurencesExceptLastOne: typeof ReplaceAllOccurencesExceptLastOne;
    words: typeof words;
    kebabCase: typeof kebabCase;
    startCase: typeof startCase;
    sentenceCase: typeof sentenceCase;
};
export default StringExtensions;