set_map_source
  
  Description:
  public void set_map_source (
MapSource map_source)
  
 
  
    Changes the currently used map source.
     unref() will be called on the previous one.
    As a side effect, changing the primary map source will also clear all secondary map sources.
    Parameters:
    
      
        | this | 
        
           a Map 
         | 
      
      
        | map_source | 
        
           a MapSource 
         |