/**
 * External-call classification & external node creation — extracted from
 * `call-graph.ts` (change: modularize-call-graph-builder; analyzer:
 * StableCallGraphBarrel).
 *
 * Unresolved calls (stdlib / HTTP / DB / filesystem / unknown) become synthetic
 * `external::<name>` leaf nodes. `classifyExternal` buckets a callee name into an
 * `ExternalKind`; `getOrCreateExternalNode` interns the leaf into the node map.
 * Pure (the only mutation is the caller-supplied `nodes` map) and dependency-light
 * — only the `ExternalKind`/`FunctionNode` types. These were file-internal helpers
 * (never on `call-graph.ts`'s public surface); `getOrCreateExternalNode` is imported
 * back by the extractors, so the public import surface is unchanged.
 */
import type { FunctionNode } from './call-graph-types.js';
export declare function getOrCreateExternalNode(name: string, nodes: Map<string, FunctionNode>): FunctionNode;
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