import { type KeyFilesUsage } from "./keyfiles.js";
/**
 * The `keyFiles` usage in one spec's source, or `null` when the spec does not
 * use the field. The first `keyFiles:` property in any object literal counts —
 * an instruction spec has one builder call, and nothing else in a spec is
 * called that.
 */
export declare function findKeyFilesInSpecSource(source: string): KeyFilesUsage | null;
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