import { BooleanBasic } from '../common/boolean';
/**
 * Determine if a value is an empty string, array, object or falsy.
 * @param value Value to check.
 *
 * @returns True if the value is empty.
 */
export declare function isBlank<T>(value: T | T[]): boolean;
/**
 * Determine if a value is an empty string, array, object.
 * @param value Value to check.
 *
 * @returns True if the value is empty.
 */
export declare function isEmpty<T>(value: T | T[]): boolean;
/**
 * Check if value is an array.
 * @param value The value to check.
 *
 * @returns True if the value is an array. False otherwise.
 */
export declare function isArray<T>(value: T): boolean;
/**
 * Check if value is a string.
 * @param value The value to check.
 *
 * @returns True if the value is a string. False otherwise.
 *
 */
export declare function isString<T>(value: T): boolean;
/**
 * Check if value is null or undefined.
 * @param value The value to check.
 *
 * @returns True if the value is null or undefined. False otherwise.
 *
 */
export declare function isNullOrUndefined<T>(value: T): boolean;
/**
 * Check if a value is an object.
 * @param value The value to check.
 *
 * @returns True if the value is an object. False otherwise.
 *
 */
export declare function isObject<T>(value: T): boolean;
/**
 * Parse an XML string.
 * @param xml The XML string to parse.
 *
 * @returns The parsed XML value.
 */
export declare function fromXml(xml: string): object;
/**
 * Parse a YAML string.
 * @param yaml The YAML string to parse.
 *
 * @returns The parsed YAML value.
 */
export declare function fromYaml(yaml: string): object;
/**
 * Parse a CSV string.
 * @param csv The CSV string to parse.
 * @param headersIncluded If the first line of the CSV string is a list of header names.
 *
 * @returns The parsed CSV value.
 */
export declare function fromCsv(csv: string, headersIncluded?: boolean): object[];
/**
 * Parse a CSV string.
 * @param csv The CSV string to parse.
 * @param headersIncluded If the first line of the CSV string is a list of header names.
 *
 * @returns The parsed CSV value.
 */
export declare function fromCsvBasic<H extends `${BooleanBasic}`>(csv: string, headersIncluded?: BooleanBasic | H): object[] | string[][];
/**
 * Serialize a value to XML.
 * @param value The value to serialize.
 *
 * @returns The XML string.
 */
export declare function toXml(value: object): string;
/**
 * Serialize a value to YAML.
 * @param value The value to serialize.
 *
 * @returns The YAML string.
 */
export declare function toYaml(value: object): string;
/**
 * Serialize a value to CSV.
 * @param value The value to serialize.
 *
 * @returns The CSV string.
 */
export declare function toCsv(value: {
    [key: string]: unknown;
}[]): string;