import { HttpInterceptor, HttpRequest, HttpHandler, HttpEvent, HttpHeaders } from '@angular/common/http';
import { Observable } from 'rxjs';
import { AuthTokenService } from '../../../auth-token/public-api';
export declare class ApiAuthorizationHeaderInterceptor implements HttpInterceptor {
    apiHttpAuthorizationHeaderName: string;
    apiHttpAuthorizationHeaderTokenTypePrefix: string;
    private authTokenService;
    constructor(apiHttpAuthorizationHeaderName: string, apiHttpAuthorizationHeaderTokenTypePrefix: string, authTokenService: AuthTokenService);
    intercept(req: HttpRequest<any>, next: HttpHandler): Observable<HttpEvent<any>>;
    /**
     * @experimental the headersWithNoAuthorization support is experimental
     * it might be considered in future this capability to be extracted
     * in an abstract class `ApiNoAuthorizationHeaderInterceptor`
     * then we can have `ApiAuthorizationHeaderInterceptor` implement the interface
     * and provide it using forwardRef or similar.
     * Yet this seems too complex for this stage.
     */
    headersWithNoAuthorization(headers?: HttpHeaders | string | {
        [name: string]: string | string[];
    }): HttpHeaders;
    private reqWithAuthorizationHeader;
}