import { MessageFunctionType, Result } from '../types';
export interface IsLowercaseErrors {
    TARGET_ARGUMENT_NOT_A_STRING: MessageFunctionType;
}
export declare const IS_LOWERCASE_ERRORS: IsLowercaseErrors;
/**
 * Checks whether the `target` string is lowercase
 *
 * ### Example
 * ```
 * expect(isLowercase('abc').value).toBeTruthy()
 * ```
 * @param target The target string
 */
export declare function isLowercase(target: string): Result<boolean | undefined>;