field_theta = filter (not . isEqPred) pre_field_theta
field_dict_tys = mkPredTys field_theta
n_field_dict_tys = length field_dict_tys
field_theta = filter (not . isEqPred) pre_field_theta
field_dict_tys = mkPredTys field_theta
n_field_dict_tys = length field_dict_tys