Argument Modification: @ModifyArg, @ModifyArgs

Argument modifiers let you modify the arguments of a method call, as shown below:

@ModifyArg(method = "methodToInject", at = @At(value = "INVOKE", target = "calledClass;calledMethod"), index = index)
private int injected(int x) {
  //your code
}
@ModifyArgs(method = "methodToInject", at = @At(value = "INVOKE", target = "calledClass;calledMethod"))
private void injected(Args args) {
  //your code
}

@ModifyArg must return a value, while @ModifyArgs modifies arguments directly through Args.get() and Args.set().