append

fun <T, D : Dimension> MultiArray<T, D>.append(vararg value: T): D1Array<T>
infix fun <T, D : Dimension, ID : Dimension> MultiArray<T, D>.append(arr: MultiArray<T, ID>): D1Array<T>
fun <T, D : Dimension> MultiArray<T, D>.append(arr: MultiArray<T, D>, axis: Int): NDArray<T, D>