$\forall$$A$:Type, $B$:($A$$\rightarrow$Type), ${\it eq}$:EqDecider($A$), $f$, $g$, $h$:$a$:$A$ fp$\rightarrow$ $B$($a$). $f$ $\subseteq$ $g$ $\Rightarrow$ $g$ $\subseteq$ $h$ $\Rightarrow$ $f$ $\subseteq$ $h$