/**
 * Economy Addon
 */
public interface EconomyAddon extends DependencyPlugin {
    /**
     * Retrieves player money
     *
     * @param player {@link OfflinePlayer}
     * @return money amount
     */
    public double getMoney ( final OfflinePlayer player ) ;

    /**
     * Deposit money to player balance
     *
     * @param player {@link OfflinePlayer}
     * @param amount money to add
     */
    public void depositMoney ( final OfflinePlayer player, final double amount ) ;

    /**
     * Withdraw money from player balance
     *
     * @param player {@link OfflinePlayer}
     * @param amount money to remove
     */
    public void withdrawMoney ( final OfflinePlayer player, final double amount ) ;
}
 

/**
 * Region Addon
 */
public interface RegionAddon extends DependencyPlugin {
    /**
     * Retrieves if a location is inside any of given regions
     *
     * @param location {@link Location}
     * @param regions  List of regions
     * @return true if location is in any region
     */
    public default boolean isInAnyRegion ( final Location location, final List <String > regions ) {
        if (regions. isEmpty ( ) ) {
            return false ;
        }

        return getRegions (location )
                . stream ( )
                . anyMatch (regions ::contains ) ;
    }

    /**
     * Retrieves if a location is inside given region
     *
     * @param location {@link Location}
     * @param region   region
     * @return true if location is in region
     */
    public default boolean isInRegion ( final Location location, final String region ) {
        if (region == null ) {
            return false ;
        }

        return getRegions (location )
                . stream ( )
                . anyMatch (region ::equals ) ;
    }

    /**
     * Retrieves location's regions
     *
     * @param location {@link Location}
     * @return Set of regions
     */
    public Set <String > getRegions ( final Location location ) ;
}
 

/**
 * Paster Addon interface
 */
public interface PasterAddon extends DependencyPlugin {
    /**
     * Paste World edit schematic in specific location
     *
     * @param location  {@link Location}
     * @param schematic {@link Schematic}
     * @return CompletableFuture of {@link PasterSession}
     */
    public CompletableFuture <PasterSession > pasteSchematic ( final Location location, final Schematic schematic ) ;
}
 

/**
 * NPC Addon
 */
public interface NPCAddon extends DependencyPlugin {
    /**
     * Retrieves if an entity is an npc
     *
     * @param entity {@link Entity}
     * @return true if it's npc
     */
    public boolean isNPC ( final Entity entity ) ;
}
 

/**
 * Placeholder Addon
 */
public interface PlaceholdersAddon extends DependencyPlugin {
    /**
     * Register a placeholder with custom placeholder replacer
     *
     * @param identifier placeholder key
     * @param replacer   {@link PlaceholderReplacer}
     */
    public void registerPlaceholders ( final String identifier, final PlaceholderReplacer replacer ) ;
}
 

        LabelProvider. builder ( )
                . id ( "theAssistantCommand" )
                . label ( "assistant" )
                . plugin (box. plugin ( ) )
                . useHelpMessage ( "&cUse Help" )
                . unknownCommandMessage ( "&cUnknown Command" )
                . onlyForPlayersMessage ( "&cThis command can be executed only for players!" )
                . noPermissionMessage ( "&cYou don't have permission to use that command!" )
                . build ( )
                . register ( ) ;

/**
 * Command provider implementation for the assistant
 */
public final class TheAssistantCommandProvider implements CommandProvider <AssistantCommand > {
    /**
     * Register a command with specific handler
     *
     * @param command Command to be registered
     * @param handler Command handler
     */
    public void registerCommand ( final AssistantCommand command, final CommandHandler <AssistantCommand > handler ) ;
}