import { MessageFunctionType, Result } from '../types';
export interface IsMimeTypeErrors {
    TARGET_ARGUMENT_NOT_A_STRING: MessageFunctionType;
}
export declare const IS_MIME_TYPE_ERRORS: IsMimeTypeErrors;
/**
 * Checks whether the `target` string is a valid Mime Type
 *
 * ### Example
 * ```
 * expect(isMimeType('application/json').value).toBeTruthy()
 * ```
 * @param target The target string
 */
export declare function isMimeType(target: string): Result<boolean | undefined>;