code: func commandHelp(args string, ui plugin.UI) {
  	if args == "" {
  		help := usage(false)
  		help = help + `
    :   Clear focus/ignore/hide/tagfocus/tagignore
  
    type "help <cmd|option>" for more information
  `
  
  		ui.Print(help)
  		return
  	}
  
  	if c := pprofCommands[args]; c != nil {
  		ui.Print(c.help(args))
  		return
  	}
  
  	if v := pprofVariables[args]; v != nil {
  		ui.Print(v.help + "\n")
  		return
  	}
  
  	ui.PrintErr("Unknown command: " + args)
  }
docs: // commandHelp displays help and usage information for all Commands
  // and Variables or a specific Command or Variable.