on second thought it's safer to check that the object returned is an instance of Error rather than NOT an instance of Package
on second thought it's safer to check that the object returned is an instance of Error rather than NOT an instance of Package

haeflimi/concrete5,haeflimi/concrete5,concrete5/concrete5,mainio/concrete5,olsgreen/concrete5,jaromirdalecky/concrete5,olsgreen/concrete5,deek87/concrete5,a3020/concrete5,jaromirdalecky/concrete5,rikzuiderlicht/concrete5,concrete5/concrete5,hissy/concrete5,haeflimi/concrete5,MrKarlDilkington/concrete5,mainio/concrete5,mlocati/concrete5,biplobice/concrete5,hissy/concrete5,biplobice/concrete5,MrKarlDilkington/concrete5,deek87/concrete5,a3020/concrete5,deek87/concrete5,concrete5/concrete5,hissy/concrete5,haeflimi/concrete5,biplobice/concrete5,mlocati/concrete5,biplobice/concrete5,MrKarlDilkington/concrete5,rikzuiderlicht/concrete5,jaromirdalecky/concrete5,concrete5/concrete5,hissy/concrete5,olsgreen/concrete5,triplei/concrete5-8,mlocati/concrete5,jaromirdalecky/concrete5,deek87/concrete5,mainio/concrete5,mlocati/concrete5,rikzuiderlicht/concrete5,triplei/concrete5-8,triplei/concrete5-8