Abstract away common error class.
Abstract away common error class.

yaoxiaoyong/github,peter-murach/github,cocktail-io/github,MalachiTatum/github,joshsoftware/github,davengeo/github,wicky-info/github,piotrmurach/github,befairyliu/github,anabhilash619/github,durai145/github,samphilipd/github,firstval/github,GistBox/github