code: function addBinding(command, keyBindings, platform) {
          var commandID = "",
              results;
  
          if (!command) {
              console.error("addBinding(): missing required parameter: command");
              return;
          }
  
          if (!keyBindings) { return; }
  
          if (typeof (command) === "string") {
              commandID = command;
          } else {
              commandID = command.getID();
          }
  
          if (Array.isArray(keyBindings)) {
              var keyBinding;
              results = [];
  
              // process platform-specific bindings first
              keyBindings.sort(_sortByPlatform);
  
              keyBindings.forEach(function addSingleBinding(keyBindingRequest) {
                  // attempt to add keybinding
                  keyBinding = _addBinding(commandID, keyBindingRequest, keyBindingRequest.platform);
  
                  if (keyBinding) {
                      results.push(keyBinding);
                  }
              });
          } else {
              results = _addBinding(commandID, keyBindings, platform);
          }
  
          return results;
      }
docs: Add one or more key bindings to a particular Command.
  
  @param {!string | Command} command - A command ID or command object
  @param {?({key: string, displayKey: string}|Array.<{key: string, displayKey: string, platform: string}>)} keyBindings
  A single key binding or an array of keybindings. Example:
  "Shift-Cmd-F". Mac and Win key equivalents are automatically
  mapped to each other. Use displayKey property to display a different
  string (e.g. "CMD+" instead of "CMD=").
  @param {?string} platform The target OS of the keyBindings either
  "mac", "win" or "linux". If undefined, all platforms not explicitly
  defined will use the key binding.
  NOTE: If platform is not specified, Ctrl will be replaced by Cmd for "mac" platform
  @return {{key: string, displayKey:String}|Array.<{key: string, displayKey:String}>}
  Returns record(s) for valid key binding(s)