Ouija with precomputed pseudotime

[skannan4]

Apologies in advance as I realise this is partially a clone of https://github.com/kieranrcampbell/ouija/issues/5. But I'm looking for several of the functionalities of ouija, but with a precomputed pseudotime from another pseudotime method. In particular, the plot_switch_times (with the error bounds) as well as the gene regulation and metastable state testing would be interesting. But I haven't been able to find similar functionality in switchde. Is there a good way to do this using either package?