def check_args(hash)
        if !hash.include? :hostname
          raise ArgumentError, "You must provide a hostname"
        elsif !hash.include? :service_name
          raise ArgumentError, "You must provide a service name"
        elsif !hash.include? :return_code
          raise ArgumentError, "You must provide a return code"
        elsif !hash.include? :status
          raise ArgumentError, "You must provide a status"
        end
      end
def check_args(hash)
        if !hash.include? :hostname
          raise ArgumentError, "You must provide a hostname"
        elsif !hash.include? :service_name
          raise ArgumentError, "You must provide a service name"
        elsif !hash.include? :return_code
          raise ArgumentError, "You must provide a return code"
        elsif !hash.include? :status
          raise ArgumentError, "You must provide a status"
        end
      end
a method to verify that all necessary requirements are satisfied