https://github.com/TomographicImaging/CIL/blob/501726d8f09c16faef19ceb69b85c212db2eeca6/Wrappers/Python/cil/optimisation/functions/Function.py#L619C1-L621C52 We can default `L=1` for these functions, see [_calculate_default_step_size](https://github.com/TomographicImaging/CIL/pull/1768/files#diff-ce9cc1fba3ea1ce3cebcc07d0a1fee4a8eb063dace5fd076ab6bf62f7aa30d44R302)
https://github.com/TomographicImaging/CIL/blob/501726d8f09c16faef19ceb69b85c212db2eeca6/Wrappers/Python/cil/optimisation/functions/Function.py#L619C1-L621C52
We can default
L=1for these functions, see _calculate_default_step_size