Added ``avp_subst_pv()`` and now this is supported: ``` $(avp(src)[*]) = "testME"; $var(x) = "/e/j/gi"; avp_subst_pv("$avp(src)", "$var(x)");
$var(z) = "j"; $var(y) = "e"; $var(x) = "/" + $var(y) + "/" + $var(z) + "/gi"; avp_subst_pv("$avp(src)", "$var(x)"); avp_subst_pv("$avp(src)", "/$var(y)/$var(z)/gi"); avp_subst_pv("$avp(src)", "/" + $var(y) + "/" + $var(z) + "/gi"); avp_subst_pv("$avp(src)", "/e/j/gi"); ```