- TIBCO BusinessEvents®
- CEP Query
- Query
- Callback

# Query.Callback

## Description

Query callback manipulation functions.

## Categories

Name | Description
--- | ---
`Metadata` | Functions to inspect the metadata of a listener.

## Functions

Name | Signature and Synopsis
--- | ---
`delete` | `void delete(String listenerName)` Deletes the listener.
`exists` | `boolean exists(String listenerName)` Checks if a listener with the given name exists.