Method getFileLines

src/resolution/types.ts:98–98

* `readFile(filePath)` split into lines, LRU-cached per file. Receiver-type * inference scans source lines for EVERY `receiver.method()` ref; splitting * the whole file per ref made that O(refs-in-file × file-size) — ~20% of * total index CPU on a Java-heavy repo and a driver of the #1122 w

(filePath: string)

   * callers fall back to splitting `readFile` themselves.
   */
  getFileLines?(filePath: string): string[] | null;
  /**
   * The method-definition nodes matching `typeName::methodName` in `language` —
   * exactly `resolveMethodOnType`'s kind/language/qualifiedName-suffix filter,