Description

Since 1.15.2, tab completion support for command arguments has been added:
https://hub.spigotmc.org/javadocs/spigot/org/bukkit/command/TabCompleter.html

This would speed up command writing a lot if you could be able to tab the custom hologram names and command arguments.

I'm sorry, as part of the switch to maintenance-only mode (read here for more info), I'm no longer adding new features or enhancements to the plugin.