[#208] Added tofu/data/_plasma.py, just started. TODO in DataCollection: check monotonicity of 1d data for checking valid ref + get ref vector from data key
[#208] Added tofu/data/_plasma.py, just started. TODO in DataCollection: check monotonicity of 1d data for checking valid ref + get ref vector from data key

ToFuProject/tofu,Didou09/tofu,ToFuProject/tofu