JAVA - cannot find symbol line 55: sendActionBar

package me.vanish; import net.md_5.bungee.api.ChatColor; import org.bukkit.command.Command; import org.bukkit.command.CommandExecutor; import org.bukkit.command.CommandSender; import org.bukkit.entity.Player; public class VanishCommand implements CommandExecutor { private final VanishPlugin plugin; private static final String PREFIX = "&8• &bᴠᴀɴɪsʜ &8» "; public VanishCommand(VanishPlugin plugin) { this.plugin = plugin; } private String color(String msg) { return ChatColor. translateAlternateColorCodes ('&', PREFIX + msg); } u/Override public boolean onCommand(CommandSender sender, Command command, String label, String[] args) { if (!(sender instanceof Player player)) { sender.sendMessage("This command can only be used by players."); return true; } if (!player.hasPermission("vanish.use")) { player.sendMessage(color("&cʏᴏᴜ ᴅᴏ ɴᴏᴛ ʜᴀᴠᴇ ᴘᴇʀᴍɪssɪᴏɴ ᴛᴏ ᴜsᴇ ᴛʜɪs ᴄᴏᴍᴍᴀɴᴅ.")); return true; } if (args.length == 0) { player.sendMessage(color("&cᴜsᴀɢᴇ: &e/vanish <on/off>")); return true; } switch