KnobsMessageListener (openxal.apps 6.8-SNAPSHOT API)

```
public interface KnobsMessageListener
```
receiver of application wide messages

Method Summary

All Methods Instance Methods Abstract Methods
Modifier and Type	Method	Description
`void`	`postErrorMessage(Object source, String message)`	Post an application wide error message from the source
`void`	`postMessage(Object source, String message)`	Post an application wide message from the source

- Method Detail
  - postMessage
```
void postMessage(Object source,
                 String message)
```
    Post an application wide message from the source
    
    Parameters:
    
    source - The source of the message
    
    message - The message posted
  - postErrorMessage
```
void postErrorMessage(Object source,
                      String message)
```
    Post an application wide error message from the source
    
    Parameters:
    
    source - The source of the message
    
    message - The message posted