Function isSyncMethodName

src/common/browser.js:14–17

  const MESSAGE = 'message';
  const STACK = 'stack';
  const isSyncMethodName = key => key === kAddListener
    || key === kRemoveListener
    || key === 'hasListener'
    || key === 'hasListeners';
  /** API types or enums or literal constants */
  const proxifyValue = (target, key, src, metaVal) => {
    const srcVal = src[key];