import { DiagnosticEmitter } from "visitor-as/as";
/**
 * A util class to control diagnostic mode.
 */
export declare class DiagnosticMode {
    warning: any;
    warningRelated: any;
    strictly: boolean;
    change(emitter: DiagnosticEmitter): void;
}
/**
 *
 * @param emitter
 * @returns return true if emitter have ERROR message
 */
export declare function hasErrorMessage(emitter: DiagnosticEmitter): boolean;
/**
 *
 * @param emitter
 * @returns return true if emitter have WARNING message
 */
export declare function hasWarningMessage(emitter: DiagnosticEmitter): boolean;