GetPart(TreeGuidePart) Method
    Get the set of characters used to render the corresponding 
        TreeGuidePart.
    public override string GetPart(TreeGuidePart part)
        - Namespace
 - Spectre
.Console .Rendering  - Containing Type
 - LineTreeGuide
 - Overridden
 - GetPart
(TreeGuidePart)  
Parameters
- TreeGuidePart part
 - The part of the tree to get rendering string for.
 
Returns
- string