Player player = event. getPlayer ( ) ; // Might be null (see above)
Object packet = event. getPacket ( ) ;
String packetClassName = event. getPacketName ( ) ;
event. setCancelled ( true ) ; // Stops the packet
event. setPacket (newPacket ) ;
Object value = event. getValue ( "fieldName" ) ;
event. setValue ( "fieldName", value ) ;

public class MainClass extends JavaPlugin {
    @Override
    public void onEnable ( ) {
       PacketEventManager eventManager = PacketInjectorPlugin. getInstance ( ). getPacketInjectorAPI ( ). getEventManager ( ) ;
       eventManager. registerPacketReceiveListener ( this, event -> {
            if (event. getPacketName ( ). equals ( "PacketPlayInChat" ) ) {
                String message = ( String ) event. getValue ( "a" ) ; // Might change between mc versions

                if (message. contains ( "bannedWord" ) ) {
                   event. setCancelled ( true ) ;
                   event. getPlayer ( ). sendMessage ( "§cDon't swear!" ) ;
                }
            }
        } ) ;
    }
}

# Starts the packet logger
/packetinjectorapi packetlogger start

# Stops the packet logger
/packetinjectorapi packetlogger stop

# Prints a message with the status of the packet logger (enabled|disabled)
/packetinjectorapi packetlogger status

# The filter subcommand allows to select the packets to be printed
# More on this down below
/packetinjectorapi packetlogger filter <allow|deny|list|reset|clear> ...

# Add, remove, clear or reset to default the list of allowed packets
# Allowed packets are the only ones to be printed to the console, except when they are also denied
/packetinjectorapi packetlogger filter allow <add|remove|clear|reset> ...

# Add, remove, clear or reset to default the list of denied packets
# Denied packets are not printed to the console
# By default, the deny list contains some packets to prevent the flooding of the console, run the "clear" subcommand if you need those packets
# The list of default denied packets can be seen using the "list" filter subcommand or can be found at this link:
# https://github.com/frengor/PacketInjectorAPI/blob/main/src/main/java/com/fren_gor/packetInjectorAPI/Commands.java#L50
/packetinjectorapi packetlogger filter deny <add|remove|clear|reset> ...

# Lists the allowed and denied packets
/packetinjectorapi packetlogger filter list

# Resets the allowed and denied lists to their default values
/packetinjectorapi packetlogger filter reset

# Clears the allow and deny lists
/packetinjectorapi packetlogger filter clear