CelEvaluationListener

Functional Interface:

This is a functional interface and can therefore be used as the assignment target for a lambda expression or method reference.
```
@FunctionalInterface
@ThreadSafe
public interface CelEvaluationListener
```
Functional interface for a callback method invoked by the runtime. Implementations must ensure that its instances are unconditionally thread-safe.

Method Summary

All Methods Static Methods Instance Methods Abstract Methods
Modifier and Type	Method	Description
`void`	`callback(CelExpr expr, java.lang.Object evaluatedResult)`	Callback method invoked by the CEL runtime as evaluation progresses through the AST.
`static CelEvaluationListener`	`noOpListener()`	Construct a listener that does nothing.

- Method Detail
  - callback
```
void callback(CelExpr expr,
              java.lang.Object evaluatedResult)
```
    Callback method invoked by the CEL runtime as evaluation progresses through the AST.
    
    Parameters:
    
    expr - CelExpr that was evaluated to produce the evaluated result.
    
    evaluatedResult - Evaluated result.
  - noOpListener
```
static CelEvaluationListener noOpListener()
```
    Construct a listener that does nothing.