**Packages**
* `"react": "^16.13.1"`
* `"eslint-plugin-react-hooks": "^4.0.8"`

The issue #18819 still happens with `eslint-plugin-react-hooks@4.0.8`.

Using the example code from the other issue gives the following errors:

![image](https://user-images.githubusercontent.com/37122343/90794940-59d9a980-e305-11ea-9ec0-98f69b41c280.png)

![image](https://user-images.githubusercontent.com/37122343/90795019-770e7800-e305-11ea-92b8-b64407b0b22c.png)


code: `
        class C {
          m() {
            This.useHook();
            Super.useHook();
          }
        }
      `,
      errors: [classError('This.useHook'), classError('Super.useHook')],
    },
    {
      code: `
        // This is a false positive (it's valid) that unfortunately 
        // we cannot avoid. Prefer to rename it to not start with "use"
        class Foo extends Component {
          render() {
            if (cond) {
              FooStore.useFeatureFlag();
            }
          }
        }
      `,
      errors: [classError('FooStore.useFeatureFlag')],
    },
    {
      code: `
        // Invalid because it's dangerous and might not warn otherwise.
        // This *must* be invalid.
        function ComponentWithConditionalHook() {
          if (cond) {