Shows the panel's toolbar.
    showToolbar(type)
    
    
        | type | string, name of the panel | 
    
 
Description
The first and only argument 
type is the name of the panel. It can be one of the following:
    - top
    
- left
    
- main
    
- right
    
- preview
    
- bottom
If you have a layout defined as:
You can hide toolbar
Or you can show toolbar