export type FrameRecord = Readonly<Record<string, unknown>>;
export type BoundedFrameText = {
    readonly kind: 'frame';
    readonly text: string;
    readonly bytes: number;
} | {
    readonly kind: 'oversized';
} | {
    readonly kind: 'unsupported';
};
export declare function boundedFrameText(event: unknown, maximum: number): BoundedFrameText;
export declare function isRecord(value: unknown): value is FrameRecord;