import * as st from "simple-runtypes";
export declare const HasMessageBodyTypemap: {
    messageBody: st.Runtype<string>;
};
export declare const HasAuthorDisplayNameTypemap: {
    authorDisplayName: st.Runtype<string>;
};
export declare const HasAuthorPhotoUrlTypemap: {
    authorPhotoUrl: st.OptionalRuntype<string>;
};