*feature*

>Warning: A component is `contentEditable` and contains `children` managed by React. It is now your responsibility to guarantee that none of those nodes are unexpectedly modified or duplicated. This is probably not intentional.

It would help heaps if I would know _which_ component is causing this.
}).toThrowError(
        'menuitem is a void element tag and must neither have `children` nor use ' +
          '`dangerouslySetInnerHTML`.',
      );
    });
    it('should validate against multiple children props', () => {
      expect(function() {
        mountComponent({children: '', dangerouslySetInnerHTML: ''});
      }).toThrowError(
        'Can only set one of `children` or `props.dangerouslySetInnerHTML`.',
      );
    });
    it('should validate against use of innerHTML', () => {
      spyOn(console, 'error');
      mountComponent({innerHTML: '<span>Hi Jim!</span>'});
      expectDev(console.error.calls.count()).toBe(1);
      expectDev(console.error.calls.argsFor(0)[0]).toContain(
        'Directly setting property `innerHTML` is not permitted. ',
      );
    });
    it('should validate against use of innerHTML without case sensitivity', () => {
      spyOn(console, 'error');
      mountComponent({innerhtml: '<span>Hi Jim!</span>'});
      expectDev(console.error.calls.count()).toBe(1);
      expectDev(console.error.calls.argsFor(0)[0]).toContain(
        'Directly setting property `innerHTML` is not permitted. ',
      );
    });
    it('should validate use of dangerouslySetInnerHTML', () => {
      expect(function() {