Fix CommandPart Validator for varargs part

src/de/steamwar/command/SWCommandUtils.java

@@ -26,7 +26,6 @@ import java.lang.annotation.Annotation;
 import java.lang.reflect.Method;
 import java.lang.reflect.Parameter;
 import java.util.*;
-import java.util.function.BiConsumer;
 import java.util.function.BiFunction;
 import java.util.function.Function;
 import java.util.stream.Collectors;
@@ -189,7 +188,7 @@ public class SWCommandUtils {
         AbstractSWCommand.ErrorMessage errorMessage = parameter.getAnnotation(AbstractSWCommand.ErrorMessage.class);
         if (errorMessage != null) {
             return (AbstractValidator<T, String>) (sender, value, messageSender) -> {
-                if (value == null) messageSender.accept(errorMessage.value(), new Object[0]);
+                if (value == null) messageSender.send(errorMessage.value(), new Object[0]);
                 return value != null;
             };
         }