Function chisep_toolbox_ilsqr 

pub fn chisep_toolbox_ilsqr() -> IlsqrParams

The iLSQR call of the χ-separation toolbox (Chisep_script.m l. 142-145) for the QSM that chi_sep_ilsqr and [super::chi_sep_medi] start from: STI_DEFAULT_NITER iterations (QSM_iLSQR’s own default, as the toolbox calls it without 'niter'), STI_GUI_PAD_MM padding, STI’s tolerances.