function ManagerMock(m) {
  const noop = () => {};
  return {
    on: noop,
    off: noop,
    destroy: noop,
    emit: noop
  };
}
// depending on support for those globals.
depending on support for those globals.
depending on support for those globals .
function ManagerMock(m) {
  const noop = () => {};
  return {
    on: noop,
    off: noop,
    destroy: noop,
    emit: noop
  };
}
function ManagerMock ( m ) { const noop = ( ) => { } ; return { on : noop , off : noop , destroy : noop , emit : noop } ; }
depending on support for those globals.
depending on support for those globals .