fix: Add synthetic check for reflection fields

src/np/com/krrish/Mapper.java

@@ -10,11 +10,13 @@ public class Mapper {
             object = aClass.getConstructor().newInstance();
             Field[] sourceFields = source.getClass().getDeclaredFields();
             for (Field sourceField : sourceFields) {
+                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();
         } catch (NoSuchFieldException ignored) {