Path mapper feature suggestion

It would be nice to have in Path mapper ability to set mapping: * → {A;B;C}

Instead of deconstructing path and constructing it again or typing in path mapper
{A} → {A;0;0}
{A;B} → {A;B;0}
{A;B;C} → {A;B;C}
{A;B;C;D} → {A;B;C}
{A;B;C;D;E} → {A;B;C}