docs: def check_arguments(cls, conf):
          """
          Sanity check plugin options values.
  
          As a side effect, it also converts the specified interval and port
          to an integer.
  
          """
          # Checking the interval
          if not conf['tcp_check_interval']:
              raise ArgsError("A TCP health-test interval needs to be "
                              "specified (--tcp_check_interval).")
  
          if not (1 <= conf['tcp_check_interval'] <= 3600):
              raise ArgsError("Specified TCP health-test interval must be "
                              "between 1 and 3600 seconds")
  
          # Checking the port
          if not conf['tcp_check_port']:
              raise ArgsError("A port for the TCP health-test needs to be "
                              "specified (--tcp_check_port).")
  
          if not (1 <= conf['tcp_check_port'] <= 65535):
              raise ArgsError("Specified port for TCP health-test must be "
                              "between 1 and 65535")