/**
 * @license
 * Copyright 2023 Google LLC
 * SPDX-License-Identifier: Apache-2.0
 */
import type { InputValues, Kit, MutableGraph, NodeHandler, NodeHandlerContext, NodeHandlerObject, NodeHandlers, NodeTypeIdentifier, OutputValues } from "@breadboard-ai/types";
export declare const callHandler: (handler: NodeHandler, inputs: InputValues, context: NodeHandlerContext) => Promise<OutputValues | void>;
export declare const handlersFromKits: (kits: Kit[]) => NodeHandlers;
/**
 * The single entry point for getting a handler for a node type.
 * The handler can be one of the two types:
 * - A graph-based handler, where the `type` is actually a
 *   URL-like string that points to a graph.
 * - A kit-based handler, where the `type` is a string that
 *   corresponds to a node type in a kit.
 *
 * The function throws an error if no handler is found for the
 * given node type.
 *
 * @param type    -- The node type to get a handler for.
 * @param context -- The context in which the handler is
 *                   being requested.
 * @returns       -- The handler for the node type.
 */
export declare function getHandler(type: NodeTypeIdentifier, context: NodeHandlerContext): Promise<NodeHandler>;
export declare function getGraphHandlerFromMutableGraph(type: NodeTypeIdentifier, mutable: MutableGraph): Promise<NodeHandlerObject | undefined>;
export declare function getGraphHandler(type: NodeTypeIdentifier, context: NodeHandlerContext): Promise<NodeHandlerObject | undefined>;
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