eg:
```
val a: String? = "hello"
a.toString() //e...
# getting-startedo
okkero
11/29/2016, 1:18 PMeg:
Copy code
val a: String? = "hello"
a.toString() //extension wins2 Views
okkero
11/29/2016, 1:18 PMval a: String? = "hello"
a.toString() //extension wins