Warn when can't go up by dchi2 = 1.
Fit for g_dz, f_dphi, f_dz at the start.
Do f fits with temp functions to get the right normalization.
Do the 1v-to-2v fit and test its prediction.
Put comment marking end of overrides section.
Some header prints.
Keep track of 1v use counts.
Separate find_g_dz, _f_dphi, _f_dz; form variable names.
Config from environment (preparing for toys).
pass_nopu and is_btagged methods.
just_print flag.
Output usage counts as ntuple.
Snippet to loop over all samples/ntracks.
Was not filling svdz_all.
/c is not /b