const mixinafPlastic::SrcCodeErrafPlastic::SrcCodeErrA mixin for Errs that report errors in source code.errLineNoSourceabstract Int errLineNo()The line number in the source code where the error occurred.msgSourceabstract Str msg()The err msgprintSource Str print(Str msg, Int linesOfPadding)srcCodeSourceabstract SrcCodeSnippet srcCode()The source code where the error occurred.