Function walk

javascript/selenium-webdriver/normalize_bidi_ast.mjs:116–123

(v)

function collectReferencedNames(ast) {
  const referenced = new Set()
  const walk = (v) => {
    if (Array.isArray(v)) {
      v.forEach(walk)
    } else if (v && typeof v === 'object') {
      if (v.Type === 'group' && typeof v.Value === 'string') referenced.add(v.Value)
      for (const key in v) if (key !== 'Name') walk(v[key])
    }
  }
  for (const def of ast) walk(def)
  return referenced
}