The header name.
| Type: | string | 
|---|---|
| Default: | |
| Valid Values: | non-empty string | 
| Importance: | medium | 
A Java regular expression for matching against the name of a record's topic.
| Type: | string | 
|---|---|
| Default: | |
| Valid Values: | non-empty string, valid regex | 
| Importance: | medium |