# File lib/grape/validations/validators/base.rb, line 57
      def self.convert_to_short_name(klass)
        ret = klass.name.gsub(/::/, '/')
                   .gsub(/([A-Z]+)([A-Z][a-z])/, '\1_\2')
                   .gsub(/([a-z\d])([A-Z])/, '\1_\2')
                   .tr('-', '_')
                   .downcase
        File.basename(ret, '_validator')
      end