import { AppState, KernelRef } from "@nteract/types";
/**
 * Returns a map of the available kernels keyed by the
 * kernel ref.
 *
 * @param   state   The state of the nteract application
 *
 * @returns         The kernels by ref
 */
export declare const kernelsByRef: (state: AppState) => import("immutable").Map<string, import("@nteract/types").KernelRecord>;
/**
 * Returns the kernel associated with a given KernelRef.
 *
 * @param   state                   The state of the nteract application
 * @param   { kernelRef: KernelRef} An object containing the KernelRef
 *
 * @returns                         The kernel for the KernelRef
 */
export declare const kernel: (state: AppState, { kernelRef }: {
    kernelRef?: string | undefined;
}) => import("immutable").RecordOf<import("@nteract/types").KernelNotStartedProps> | import("immutable").RecordOf<import("@nteract/types").LocalKernelProps> | import("immutable").RecordOf<import("@nteract/types").RemoteKernelProps> | null;
/**
 * Returns the KernelRef for the kernel the nteract application is currently
 * connected to.
 *
 * @param   state   The state of the nteract application
 *
 * @returns         The KernelRef for the kernel
 */
export declare const currentKernelRef: (state: AppState) => string | null;
/**
 * Returns the kernelspec of the kernel that we are currently connected to.
 * Returns null if there is no kernel.
 */
export declare const currentKernel: import("reselect").OutputSelector<AppState, import("immutable").RecordOf<import("@nteract/types").KernelNotStartedProps> | import("immutable").RecordOf<import("@nteract/types").LocalKernelProps> | import("immutable").RecordOf<import("@nteract/types").RemoteKernelProps> | null | undefined, (res1: string | null, res2: import("immutable").Map<string, import("@nteract/types").KernelRecord>) => import("immutable").RecordOf<import("@nteract/types").KernelNotStartedProps> | import("immutable").RecordOf<import("@nteract/types").LocalKernelProps> | import("immutable").RecordOf<import("@nteract/types").RemoteKernelProps> | null | undefined>;
/**
 * Returns the type of the kernel the nteract application is currently
 * connected to. Returns `null` if there is no kernel.
 */
export declare const currentKernelType: import("reselect").OutputSelector<AppState, "unknown" | "websocket" | "zeromq" | null, (res: import("immutable").RecordOf<import("@nteract/types").KernelNotStartedProps> | import("immutable").RecordOf<import("@nteract/types").LocalKernelProps> | import("immutable").RecordOf<import("@nteract/types").RemoteKernelProps> | null | undefined) => "unknown" | "websocket" | "zeromq" | null>;
/**
 * Returns the state of the kernel the nteract application is currently
 * connected to. Returns "not connected" if there is no kernel.
 */
export declare const currentKernelStatus: import("reselect").OutputSelector<AppState, string, (res: import("immutable").RecordOf<import("@nteract/types").KernelNotStartedProps> | import("immutable").RecordOf<import("@nteract/types").LocalKernelProps> | import("immutable").RecordOf<import("@nteract/types").RemoteKernelProps> | null | undefined) => string>;