Fix immutable field annotation
Fix immutable field annotation

samth/pycket,magnusmorton/pycket,cderici/pycket,samth/pycket,magnusmorton/pycket,vishesh/pycket,pycket/pycket,pycket/pycket,pycket/pycket,samth/pycket,vishesh/pycket,cderici/pycket,vishesh/pycket,magnusmorton/pycket,cderici/pycket