addCommand(self,
        name,
        command,
        shortcut,
        icon,
        tooltip,
        index,
        readonly)
  
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  Add a new command to this menu/toolbar. Note that when invoked, the 
  command is automatically enclosed in an undo group, so that undo/redo 
  functionality works. Optional arguments can be specified by name. Note 
  that if the command argument is not specified, then the command will be 
  auto-created as a "nuke.createNode()" using the name argument 
  as the node to create. 
  Example: menubar = nuke.menu('Nuke') fileMenu = 
  menubar.findItem('File') fileMenu.addCommand('NewCommand', 'print 10', 
  shortcut='t') 
  
    - Parameters:
 
    
        name - The name for the menu/toolbar item. The name may contain submenu 
          names delimited by '/' or '', and submenus are created as needed. 
        command - Optional. The command to add to the menu/toolbar. This can be a 
          string to evaluate or a Python Callable (function, method, etc) 
          to run. 
        shortcut - Optional. The keyboard shortcut for the command, such as 'R', 
          'F5' or 'Ctrl-H'. Note that this overrides pre-existing other 
          uses for the shortcut. 
        icon - Optional. An icon for the command. This should be a path to an 
          icon in the nuke.pluginPath() directory. If the icon is not 
          specified, Nuke will automatically try to find an icon with the 
          name argument and .png appended to it. 
        tooltip - Optional. The tooltip text, displayed on mouseover for toolbar 
          buttons. 
        index - Optional. The position to insert the new item in, in the 
          menu/toolbar. This defaults to last in the menu/toolbar. 
        readonly - Optional. True/False for whether the item should be available 
          when the menu is invoked in a read-only context. 
        contextWidget - Optional. Sets the shortcut context widget (0==Window, 
          1=Application, 2=DAG). 
      
    - Returns: The menu/toolbar item that was added to hold the command
 
        - The menu/toolbar item that was added to hold the command.
 
   
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