PlasmaCalcs.addons.instability_tools.instability_theory_tools.xarray_kds_at_growmax

PlasmaCalcs.addons.instability_tools.instability_theory_tools.xarray_kds_at_growmax(array)
returns dataset of kmod & kang, where growth rate is maxxed across k.
growth = array if real DataArray; imag(array) if complex DataArray; ds[‘omega’].imag if Dataset.
result is a dataset with 2 datavars (telling kmod and kang), with names:
array.it.kmod_coord and array.it.kang_dim.