export declare const CONSTANTS: {
    REGEX_VALID_URL: RegExp;
    REGEX_LOOPBACK: RegExp;
    REGEX_CONTENT_TYPE_IMAGE: RegExp;
    REGEX_CONTENT_TYPE_AUDIO: RegExp;
    REGEX_CONTENT_TYPE_VIDEO: RegExp;
    REGEX_CONTENT_TYPE_TEXT: RegExp;
    REGEX_CONTENT_TYPE_APPLICATION: RegExp;
};