import { INodeInputSlot, INodeOutputSlot, OptionalProps, ReadOnlyPoint } from '../interfaces';
import { LGraphNode } from '../LGraphNode';
import { LinkId } from '../LLink';
import { SubgraphInput } from '../subgraph/SubgraphInput';
import { SubgraphOutput } from '../subgraph/SubgraphOutput';
import { IBaseWidget } from '../types/widgets';
import { IDrawOptions, NodeSlot } from './NodeSlot';
export declare class NodeInputSlot extends NodeSlot implements INodeInputSlot {
    #private;
    link: LinkId | null;
    get isWidgetInputSlot(): boolean;
    /** Internal use only; API is not finalised and may change at any time. */
    get _widget(): IBaseWidget | undefined;
    set _widget(widget: IBaseWidget | undefined);
    get collapsedPos(): ReadOnlyPoint;
    constructor(slot: OptionalProps<INodeInputSlot, "boundingRect">, node: LGraphNode);
    get isConnected(): boolean;
    isValidTarget(fromSlot: INodeInputSlot | INodeOutputSlot | SubgraphInput | SubgraphOutput): boolean;
    draw(ctx: CanvasRenderingContext2D, options: Omit<IDrawOptions, "doStroke" | "labelPosition">): void;
}