export type FreeIdentifier = {
    /** The identifier that is read but bound by nothing. */
    name: string;
    /** 1-based line in the EMITTED module. */
    line: number;
    /** 1-based column in the emitted module. */
    column: number;
    /**
     * The top-level declaration the read sits inside — `export const cssFactory`,
     * `function build`, … — or null if it is at statement level. This is what turns
     * "free identifier `sequence`" into a place to go and look.
     */
    enclosing: string | null;
};
/**
 * Every identifier the emitted module READS but nothing binds.
 *
 * Returns an empty array when the module can't be parsed: a check that can't see
 * the code has nothing to say about it, and refusing to emit on a parse failure
 * would turn this into a second, worse syntax error.
 */
export declare function findFreeIdentifiers(code: string, filename: string): FreeIdentifier[];
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