/**
 * This regex makes a best-effort determination that the tested string matches
 * the NativeFunction grammar production without requiring a correct tokeniser.
 */
const NATIVE_FUNCTION_RE = /\bfunction\b[\s\S]*\([\s\S]*\)[\s\S]*\{[\s\S]*\[[\s\S]*\bnative\b[\s\S]+\bcode\b[\s\S]*\][\s\S]*\}/;