title: AttributeError: module 'keras.layers' has no attribute 'Wrapper'
body: <p>This error happens cause I used <code>from astroNN.models import Galaxy10CNN</code> and do downgrade Tensorflow to 1.15.2 to prevent the <code>ImportError: cannot import name 'get_default_session'</code> but see new error related to attribute 'Wrapper'   <code>AttributeError: module 'keras.layers' has no attribute 'Wrapper'</code></p>
  <p>Please advise. Thanks!</p>