LayerManager.getNextSuitableLayer Method
        
 Find and select the next best usable layer.
         
        Parameters
        
            - targetLayerOrdinal
            
 
            - 
                
Type: Number - May be null
 (Optional) Specifies the layer ordinal at which the search for the next suitable layer should commence.  
            - targetGridTemplateAdorner
            
 
            - 
                
Type: GridTemplateAdorner - May be null
 (Optional) Specifies the GridTemplateAdorner to restrict the search for.