getValue

An extension operator that allows delegating a read-only property of type V to a property reference to a property of type V or its subtype.

class Login(val username: String)
val defaultLogin = Login("Admin")
val defaultUsername by defaultLogin::username
// equivalent to
val defaultUserName get() = defaultLogin.username

An extension operator that allows delegating a read-only member or extension property of type V to a property reference to a member or extension property of type V or its subtype.

class Login(val username: String)
val Login.user by Login::username
// equivalent to
val Login.user get() = this.username

An extension to delegate a read-only property of type T to an instance of Lazy.

This extension allows to use instances of Lazy for property delegation: val property: String by lazy { initializer }