/**
 * Tries parsing a boolean from the specified value.
 * @param value Can be a boolean, a string or undefined. Strings are trimmed and lowercased before being compared to boolean equivalents.
 * @returns A boolean if the value was parsed successfully, or undefined otherwise.
 */
export declare function parseBoolean(value: boolean | string | undefined): boolean | undefined;
/**
 * Tries parsing a number from the specified value.
 * @param value Can be a number, a string or undefined. Strings are trimmed before being converted to numbers.
 * @returns A number if the value was parsed successfully, or undefined otherwise.
 */
export declare function parseNumber(value: number | string | undefined): number | undefined;