So I've recently changed some things in the server, but when i compile it says source\server\model\players\packets\Commands.java: 58: error: cannot find symbol
This.Antileech("Remove This Line");
^
symbol: variable This
location: class Commands
Note: Some input files use unchecked or unsafe operations.
Note: Recompile with -Xlint:unchecked for details.
1 error
Press any key to continue . . .

Anyone know the problem?