我知道在Kotlin中使用扩展函数来扩展类(例如，库或API中的类)的功能.
However, is there any advantage, in terms of code readability/structure, by using extension functions:
class Foo { ... }
fun Foo.bar() {
// Some stuff
}
As opposed to member functions:
class Foo {
...
fun bar() {
// Some stuff
}
}
?
Is there a recommended practice?