code: function checkAvailable(map, command, logType, logMsg) {
          if (map[command]) {
              const prefix = logType === 'error' ? 'ERROR' : 'WARNING';
              forum.emit(logType, `${prefix}, ${command} is already registered: ${logMsg}`);
              return false;
          }
          return true;
      }
docs: Check the availability of a command
  
  @param {object} map A map of commands to check availability against
  @param {string} command Name of command to check
  @param {string} logType Type of log to log if command isn't available
  @param {string} logMsg Message to log if command is not available
  @returns {boolean} True if available, false otherwise