code: function getCommandHelps() {
          const cmds = {},
              topics = {},
              result = ['Registered commands:'];
          let keys = {};
          Object.keys(handlers).map((key) => {
              keys[key] = 1;
          });
          Object.keys(helpTopics).map((key) => {
              keys[key] = 1;
          });
          Object.keys(keys).map((key) => {
              if (handlers[key]) {
                  cmds[key] = handlers[key].help;
                  if (helpTopics[key]) {
                      cmds[key] += ' *';
                  }
              } else {
                  topics[key] = 'Extended help topic';
              }
          });
          keys = Object.keys(cmds);
          keys.sort();
          keys.forEach((cmd) => result.push(`${cmd}: ${cmds[cmd]}`));
          keys = Object.keys(topics);
          if (keys.length) {
              result.push('');
              result.push('Help Topics:');
              keys.sort();
              keys.forEach((topic) => result.push(`${topic}: ${topics[topic]}`));
          }
          return result.join('\n');
      }
docs: Get help text for commands
  
  @private
  
  @returns {string} Command help text