Function addReg

src/resolution/callback-synthesizer.ts:256–261

(field: string | undefined, node: Node, absLine: number)

  const registrars = new Map<string, Array<{ node: Node; line: number }>>();   // field → registrar methods + append line

  const addReg = (field: string | undefined, node: Node, absLine: number) => {
    if (!field || /^\d+$/.test(field)) return; // `$0.append` mis-captures the `0`; the write-RE owns that field
    const arr = registrars.get(field) ?? [];
    if (!arr.some((r) => r.node.id === node.id)) arr.push({ node, line: absLine });
    registrars.set(field, arr);
  };

  // Slices EVERY Swift/Kotlin method/function's source (no cheap name-gate), so
  // on a repo with a huge file this is the heaviest synthesis pass — yield