def get_catalog():
    """Returns a catalog of available transforms.  These are used to
    build chains for rendering with different back ends.
    """
    tforms = {}
    for name, value in list(globals().items()):
        if name.endswith('Transform'):
            tforms[name] = value

    return Bunch.Bunch(tforms, caseless=True)
Returns a catalog of available transforms.  These are used to
    build chains for rendering with different back ends.