module InvestecOpenApi
  module StringUtilities
    refine String do
      def underscore
        self.gsub(/::/, "/")
            .gsub(/([A-Z]+)([A-Z][a-z])/, '\1_\2')
            .gsub(/([a-z\d])([A-Z])/, '\1_\2')
            .tr("-", "_")
            .downcase
      end
    end
  end
end