Kotlin file to kotlin class

Question

I created a kotlin file instead kotlin class, but my file is a class truly and the icon continue as follow

I would like if the icon was as follows (just why I feel comfortable so)

Thanks for any suggestions on how to solve it

Answer 1

Create a class in that file with the same name of the file:

If the file is MyClass.kt

add to the file

class MyClass{

}

If the file only contains the class it will have the second icon. If you add anything else to that file it will change back to the first icon.