========================= Developer's documentation ========================= To-do ===== Different approaches to estimate the predicition delay used for the Phase Transfer Entropy method shall be implemented and evaluated. Especially, a more sophisticated estimation as suggested by [Wibral2013]_ is desirable. .. [Wibral2013] Wibral, Michael and Pampu, Nicolae and Priesemann, Viola and Siebenhühner, Felix and Seiwert, Hannes and Lindner, Michael and Lizier, Joseph T and Vicente, Raul. Measuring Information-Transfer Delays. *PLOS ONE 8(2): e55809*, 2013. `doi:10.1371/journal.pone.0055809 `_