Reference

All functions
RHSForm()	extract right-hand side of a formula
anySpecial()	Detect whether there are any 'specials' in a formula term
expandDoubleVerts()	Expand terms with '||' notation into separate '|' terms
expandGrpVar()	apply
findReTrmClasses()	list of specials – taken from enum.R
isNested()	Is f1 nested within f2?
mkReTrms()	Create list of structures needed for models with random effects
no_specials()	Drop 'specials' from a formula
nobars() nobars_()	Omit terms separated by vertical bars in a formula
subbars()	"Substitute bars"