fix: Add synthetic check for reflection fields

src/np/com/krrish/Mapper.java

@@ -10,10 +10,12 @@ public class Mapper {
             object = aClass.getConstructor().newInstance();
             Field[] sourceFields = source.getClass().getDeclaredFields();
             for (Field sourceField : sourceFields) {
-                sourceField.setAccessible(true);
-                Field destinationField = object.getClass().getDeclaredField(sourceField.getName());
-                destinationField.setAccessible(true);
-                destinationField.set(object, sourceField.get(source));
+                if (!sourceField.isSynthetic()) {
+                    sourceField.setAccessible(true);
+                    Field destinationField = object.getClass().getDeclaredField(sourceField.getName());
+                    destinationField.setAccessible(true);
+                    destinationField.set(object, sourceField.get(source));
+                }
             }
         } catch (ClassNotFoundException | InstantiationException | IllegalAccessException | NoSuchMethodException | InvocationTargetException e) {
             e.printStackTrace();