Non-dense orbit sets carry full metric mean dimension

Let $(X,d)$ be a compact metric space, $f:X\to X$ be a continuous transformation with the specification property. we consider non-dense orbit set $E(z_0)$ and show that for any non-transitive point $z_0\in X$, this set $E(z_0)$ is empty or carries full Bowen upper and lower metric mean dimension.