Comment on “The role of wetting heterogeneities in the meandering instability of a partial wetting rivulet” by Couvreur S. and Daerr A.N. Fathi, K. Mertens, V. Putkaradze and P. VorobieffEPL, 108 5 (2014) 54002DOI: https://doi.org/10.1209/0295-5075/108/54002