export declare enum OpenApiVersion {
    V2 = 2,
    V3 = 3
}
/**
 * Get the Open API specification version (V2 or V3). This generator only supports
 * version 2 and 3 of the specification, so we will alert the user if we encounter
 * an incompatible type. Or if the type is missing...
 * @param openApi The loaded spec (can be any object)
 */
export declare function getOpenApiVersion(openApi: any): OpenApiVersion;