@Override
	default Op<T> get() {
		return this;
	}
Return {@code this} operation, or a new instance from the same type, if
the operation needs to maintain internal state. This is essentially the
case for ephemeral constants.

@see EphemeralConst

@return {@code this} operation, or a new instance
jenetics.prog/src/main/java/io/jenetics/prog/op/Op.java