/**
 * Docstring & declaration-signature extraction helpers — extracted from
 * `call-graph.ts` (change: modularize-call-graph-builder; analyzer:
 * StableCallGraphBarrel).
 *
 * Two pure string-scanning functions over source text + AST byte offsets, with no
 * dependency on the rest of the analyzer (no tree-sitter, no module state). They
 * were file-internal helpers in `call-graph.ts` (never on its public surface), so
 * they are exported here and imported back by the extractors — the public import
 * surface of `call-graph.ts` is unchanged. Moving them cannot alter graph output.
 */
/**
 * Scan backward from `startIndex` in `source` to find the doc comment
 * immediately preceding the function declaration. Skip blank lines.
 *
 * For Python, docstrings are INSIDE the function body — scan forward from
 * `startIndex` past the `def name(...):` colon to find the triple-quoted string.
 *
 * Returns the first meaningful (non-empty, non-decorator) line of the comment.
 */
export declare function extractDocstringBefore(source: string, startIndex: number, language: string): string | undefined;
/**
 * Extract the function declaration (signature without body) from
 * `source.slice(startIndex, endIndex)`.
 *
 * Strategy:
 * - TS/JS/Java/C++/Go/Rust/Ruby: take everything up to the first `{` at depth 0
 * - Python: take everything up to the first `:` that ends the `def` line
 *
 * Whitespace is normalized (multiple spaces/newlines → single space).
 * Limited to 300 characters max.
 */
export declare function extractDeclaration(source: string, startIndex: number, endIndex: number, language: string): string;
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