## get-function-name-x
Get the name of the function.
### `module.exports(fn)` ⇒ undefined \| string ⏏
This method returns the name of the function, or `undefined` if not
a function.
**Kind**: Exported function
**Returns**: undefined \| string - The name of the function, or `undefined` if
not a function.
| Param | Type | Description |
| ----- | --------------------- | -------------------------------- |
| fn | function | The function to get the name of. |
**Example**
```js
import getFunctionName from 'get-function-name-x';
console.log(getFunctionName()); // undefined
console.log(getFunctionName(Number.MIN_VALUE)); // undefined
console.log(getFunctionName('abc')); // undefined
console.log(getFunctionName(true)); // undefined
console.log(getFunctionName({name: 'abc'})); // undefined
console.log(getFunctionName(function() {})); // ''
console.log(getFunctionName(new Function())); // ''
console.log(getFunctionName(function test1() {})); // 'test1'
console.log(getFunctionName(function* test2() {})); // 'test2'
console.log(getFunctionName(class Test {});) // 'Test'
```