code: function _createSandbox(config) {
    if (proxiedGlobal && proxiedGlobal) return workspaces.get(...makeArray(config.workspace));
  
    const sandbox = {};
    if (config.includeGlobals && (!proxiedGlobal || !config.proxyGlobal)) Object.assign(sandbox, global);
  
    return vm.createContext(sandbox);
  }
docs: Given a config, create/get the sandbox for it.
  
  @private
  @param {Object} config     Config for this operation.
  @returns {Object|Proxy}    Sandbox object.