raise ImportError(
    '''
    The holography implementation is removed. Development has moved to
    https://github.com/LiberTEM/LiberTEM-holo. Users who depend on the previous code
    can use an older LiberTEM version (&lt;= 0.14.1) for the time being and migrate
    to the new holography sub-project when appropriate.

    More information:
    - https://github.com/LiberTEM/LiberTEM/pull/1689
    '''
)
