import { Optional } from "@angular/core";
export declare enum LogLevel {
    debug = "debug",
    info = "info",
    log = "log",
    warn = "warn",
    error = "error"
}
/**
 * @ignore
 * To modify nui env from outside please create a new instance of NuiEnvironment and
 * include it in a custom provider
 */
export declare class NuiEnvironment {
    logLevel: LogLevel;
}
/** @ignore */
export declare function NUI_ENV_PROVIDER_FACTORY(parentEnv: NuiEnvironment): NuiEnvironment;
/** @ignore */
export declare const NUI_ENV_PROVIDER: {
    provide: typeof NuiEnvironment;
    deps: Optional[][];
    useFactory: typeof NUI_ENV_PROVIDER_FACTORY;
};
