LabelValidator (Jenkins core 2.454 API)

All Superinterfaces:

ExtensionPoint
```
public interface LabelValidator
extends ExtensionPoint
```
Plugins may want to contribute additional restrictions on the use of specific labels for specific context items. This extension point allows such restrictions.

Since:

2.243

Nested Class Summary
- Nested classes/interfaces inherited from interface hudson.ExtensionPoint
  ExtensionPoint.LegacyInstancesAreScopedToHudson

Method Summary

All Methods Instance Methods Abstract Methods
Modifier and Type	Method	Description
`FormValidation`	`check(Item item, Label label)`	Validates the use of a label within a particular context.

- Method Detail
  - check
```
@NonNull
FormValidation check(@NonNull
                     Item item,
                     @NonNull
                     Label label)
```
    Validates the use of a label within a particular context.
    Note that "OK" responses (and any text/markup that may be set on them) will be ignored. Only warnings and errors are taken into account, and aggregated across all validators.
    
    Parameters:
    
    item - The context item to be restricted by the label.
    
    label - The label that the job wants to restrict itself to.
    
    Returns:
    
    The validation result.