Call the on function with either data or close function.
        
        
            
    Parameters:
    
    
    
        
        | Name | 
        
        Type | 
        
        
        Description | 
    
    
    
    
        
            
                data | 
            
            
            
                
string
            
             | 
            
            
            The module is defined to parse JSON data. The client checks for the
                            'function' in data. The event 'update' or 'status' will be triggered
                            and accordingly 'receiver_cb' or 'stale_cb' will be checked for
                            null values. | 
        
    
        
            
                close | 
            
            
            
                
string
            
             | 
            
            
            The callback function close_cb is checked for null values and close_cb()
                            is called | 
        
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    - Source:
 
    
    
    
    
    
        
            
    Parameters:
    
    
    
        
        | Name | 
        
        Type | 
        
        
        Description | 
    
    
    
    
        
            
                type | 
            
            
            
                
array
            
             | 
            
            
            type of event:
    - receiver: calls back with new streams that are available
    - sender: calls back with new streams that are subscribed
    - stale: call back with streams that went stale for this receiver and can be unsubscribed
    - dropped: calls back with streams that dropped the subscription for a sender
    - close: the control connection was closed
    - data: calls back when data has arrived with (streamID, data, header) | 
        
    
        
            
                cb | 
            
            
            
                
array
            
             | 
            
            
            a function with the corresponding callback | 
        
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    - Source: