example OpaqueProfile1.py broken

../auto/Examples/varia/OpaqueProfile1.py 
Traceback (most recent call last):
  File "/G/sw/ba/build/../auto/Examples/varia/OpaqueProfile1.py", line 58, in <module>
    simulation = get_simulation(sample)
                 ^^^^^^^^^^^^^^^^^^^^^^
  File "/G/sw/ba/build/../auto/Examples/varia/OpaqueProfile1.py", line 50, in get_simulation
    z_axis = ba.FixedBinAxis("z", nz, z_min, z_max)
             ^^^^^^^^^^^^^^^
AttributeError: module 'bornagain' has no attribute 'FixedBinAxis'