function isStatelessComponentReturningNull(node) {
      const component = utils.getStatelessComponent(node);

      return component && !utils.isReturningJSX(component);
    }
Check whether given node is a stateless component returning non-JSX
```jsx
{{ a: () => null }}
```
@param {ASTNode} node The AST node being checked
@returns {boolean} True if node is a stateless component returning non-JSX, false if not