|Subject:||Depreciation way of work in LMU|
For several reasons it's required for users of LMU to make a decision about the behavior to use. In general - there're two general behaviors: 1) Precise: Functions return a dedicated state when no result is available (eg. undef in the example of "all" - when no item was given). 2) Unprecise: return some kind of default value (probably choosable?) Additional implementations might contain functions which clash with other utility packages - thus allowing pick the list of implementations / behaviors or whatever is intended. The other option: break behavior immediately has been discussed and is not available for next release version.