supportsAddFolder(String newFolderType) Returns true if this folder can have sub folders of the specified type;
false otherwise.
Parameters: newFolderType - the folder that is going to be inserted as a child.
Returns true if this folder can have sub folders of the specified type;
false otherwise.
Parameters: newFolderType - the folder that is going to be inserted as a child. true if this folder can have sub folders; false otherwise.