func looksLikeError(i *ast.Ident) bool {
	prefix := "err"
	if i.IsExported() {
		prefix = "Err"
	}
	return strings.HasPrefix(i.Name, prefix)
}
func looksLikeError(i *ast.Ident) bool {
	prefix := "err"
	if i.IsExported() {
		prefix = "Err"
	}
	return strings.HasPrefix(i.Name, prefix)
}
// looksLikeError returns true if the AST identifier starts
// with 'err' or 'Err', or false otherwise.
//
// TODO: https://github.com/leighmcculloch/gochecknoglobals/issues/5