abstract fun copy(): Bytes! (source)
Return a value equivalent to this one but guaranteed to 1) be deeply immutable (i.e. the underlying value will be immutable) and 2) to not retain more bytes than exposed by the value.
Return
Bytes!: A value, equals to this one, but deeply immutable and that doesn't retain any "unreachable" bytes. For performance reasons, this is allowed to return this value however if it already fit those constraints.