repositories {
   mavenCentral ( )
}

dependencies {
   compileOnly ( "io.github.nottamion:commandclip:1.1.0" )
}

<dependency>
    <groupId>io.github.nottamion</groupId>
    <artifactId>commandclip</artifactId>
    <version>1.1.0</version>
</dependency>

libraries :
 - io.github.nottamion:commandclip:1.1.0

new BaseCommand ( "hello", this )
   . subCommand ( new SubCommand ( "there" )
       . executes ( (commandSender, s, strings ) -> {
           commandSender. sendMessage (s + " there " + strings [ 0 ] ) ;
        } )
       . tabCompletes ( (commandSender, s, strings ) -> strings. length == 1 ? Bukkit. getOnlinePlayers ( ). stream ( ). map (Player ::getName ). toList ( ) : List. of ( ) )
       . testArgs ( (commandSender, s, strings ) -> {
            if (strings. length != 1 )
                return "Please provide a valid playername" ;
            if ( !Bukkit. getOnlinePlayers ( ). stream ( ). map (player -> player. getName ( ) ). toList ( ). contains (strings [ 0 ] ) )
                return "Player is not online" ;
            return null ;
        } )
       . permission ( "hello.there", "You aren't allowed to get a Welcome :(" ) )
   . alias ( "hi" )
   . commandDescription ( "Welcomes you" )
   . commandPermission ( "hello" )
   . register ( ) ;