there are some fields else when use Java reflect to get fields

I used APIModel.getClass().getDeclaredFields() to get fields,but as a result there are some fields else:

org.codehaus.groovy.reflection.ClassInfo@1d9b76bf

FALSE

groovy.lang.MetaClassImpl@5fd1f73a[class APIModel]

java.lang.ref.SoftReference@62e2dc91

I have no idea...