provide utility functions for error decomposition
provide utility functions for error decomposition

ingwinlu/relx,bitwalker/relx,timclassic/relx,lrascao/relx,erlware/relx,Licenser/relx,zugolosian/relx,RJ/relx,bsmr-erlang/relx,umatomba/relx,priestjim/relx,syl20bnr/relx,ethercrow/relx,tsloughter/relx