Disabling the `Alt-Tab` Keyboard Shortcut when a certain app is active?

Question

I know that I'm able to disable (and even change) the Alt+Tab window switching shortcut through Ubuntu's settings menu. However, what I'd like to do is keep it for all but a certain application.

Is there a way to conditionally disable Alt+Tab when that application is open? Or some way I can rig a script together to do approximately this?

---

EDIT: The specific application I want Alt-Tabbing disabled for is godot. The following script (from this post) fails to work on my machine:

#!/bin/bash

keySwitchApplication="switch-applications"
keySwitchApplicationBackward="switch-applications-backward"

backupSwitchApplications="$(gsettings get org.gnome.desktop.wm.keybindings "$keySwitchApplication")"
disableSwitchApplications="$(gsettings get org.gnome.desktop.wm.keybindings "$keySwitchApplication" | sed "s/\,*\s*'<Alt>Tab'//")"

backupSwitchApplicationsBackward="$(gsettings get org.gnome.desktop.wm.keybindings "$keySwitchApplicationBackward")"
disableSwitchApplicationsBackward="$(gsettings get org.gnome.desktop.wm.keybindings "$keySwitchApplicationBackward" | sed "s/\,*\s*'<Shift><Alt>Tab'//")"

disabled="0"

while true; do
  isActive=$(wmctrl -lx | awk -v search=$(printf 0x0%x $(xdotool getactivewindow)) -v wm_class="$wm_class" '{ if($1 ~ search && $3 ~ /godot/) print $3 }')

  if [[ "$isActive" != "" ]]; then
    # echo "active"
    if [[ "$disabled" == "0" ]]; then
      # echo "disable shortcut"
      gsettings set org.gnome.desktop.wm.keybindings "$keySwitchApplication" "$disableSwitchApplications"
      gsettings set org.gnome.desktop.wm.keybindings "$keySwitchApplicationBackward" "$disableSwitchApplicationsBackward"
      disabled="1";
    fi
  else
    # echo "not active"
    if [[ "$disabled" == "1" ]]; then
      # echo "enable shortcut"
      gsettings set org.gnome.desktop.wm.keybindings "$keySwitchApplication" "$backupSwitchApplications"
      gsettings set org.gnome.desktop.wm.keybindings "$keySwitchApplicationBackward" "$backupSwitchApplicationsBackward"
      disabled="0"
    fi;
  fi;
  sleep 1
done

In fact just simply calling

gsettings set org.gnome.desktop.wm.keybindings switch-applications-backward "['']"

gsettings set org.gnome.desktop.wm.keybindings switch-applications "['']"

fails to disable Alt-Tabbing in Ubuntu 19.04.