Platform and version requirements: JVM (1.0), JS (1.0), Native (1.0)

abstract fun add(element: E): Boolean

Adds the specified element to the end of this list.

Return true because the list is always modified as the result of this operation.

Platform and version requirements: JVM (1.0), JS (1.0), Native (1.0)

abstract fun add(index: Int, element: E)

Inserts an element into the list at the specified index.