export interface LongMessage {
    int64Field?: string;
    uint64Field?: string;
    int64ValueField?: string | null;
    uint64ValueField?: string | null;
    sint64Field?: string;
    sfixed64Field?: string;
    fixed64Field?: string;
    durationField?: GoogleProtoDuration;
    _id?: string | null;
}
export interface LongMessageNonNullableFields {
    int64Field: string;
    uint64Field: string;
    sint64Field: string;
    sfixed64Field: string;
    fixed64Field: string;
}
type GoogleProtoDuration = any;
/**
 * echo given arg1 and arg2
 * @public
 * @documentationMaturity preview
 */
export declare function publicLongEcho(options?: PublicLongEchoOptions): Promise<LongMessage & LongMessageNonNullableFields>;
export interface PublicLongEchoOptions {
    int64Field?: string;
    uint64Field?: string;
    int64ValueField?: string | null;
    uint64ValueField?: string | null;
    sint64Field?: string;
    sfixed64Field?: string;
    fixed64Field?: string;
    durationField?: GoogleProtoDuration;
    _id?: string | null;
}
export {};