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This is found for example in module frontend of the compiler:

	# dcl_mods & [module_n].dcl_common = common \\ common <-: ti_common_defs & module_n<-[0..]

It is for example used as an argument to `prepare_unification`. There
are cases however where this function is only called when unification is
requested by the user, and otherwise no `prepare_unification` call is
made.

Remove IndexArray synonym type to work around generic issue (fixed in clean-compiler-and-rts/compiler!3)

Fix removeContainedEntries (led to incorrect distances for constructors when the type name itself was also matched)

Make sure usage entries are sorted after collecting parent usages of constructors, fields and class members