declare global { interface String { contains(value: string): boolean; } } export declare const isEmptyOrWhiteSpace: (s?: string) => boolean; export declare const emptyOrNotString: (str?: string) => boolean; export declare const isNotEmpty: (str: string | any) => str is string; export declare const getNotEmptyLowerCase: (value: string) => string | undefined; export declare const getQuotedString: (caption: string) => string; export declare const replaceAll: (str: string, find: string, replace: string) => string; export declare const endWith: (str: string, value: string) => boolean; export declare const startWith: (str: string, value: string) => boolean; export declare const isParameter: (value: string) => boolean; export declare const isRefColumn: (value: string) => boolean; export declare const simplifyHtml: (htmlStr: string) => string; export declare const getUnicodeCharAt: (s: string, position: number) => string; export declare const getFirstWordLetters: (str: string, limit: number) => string; export declare const getParameterNameByPath: (parameterName: string) => string | undefined; export declare const getNotMoreThan: (s: string, maxLen: number) => string; export declare const removeSpaces: (str: string) => string; export declare const strFromList: (...list: (string | undefined)[]) => string;