# SpanLabel
<span class="source-link">[[Source]](src/pony_check/_span.md#L-0-19)</span>

Labels that identify what kind of structure a span represents.
Pass one to `Randomness.start_span` when building custom generators.


```pony
type SpanLabel is
  (SpanShuffle val | SpanFilter val | SpanElement val)
```

#### Type Alias For

* ([SpanShuffle](pony_check-SpanShuffle.md) val | [SpanFilter](pony_check-SpanFilter.md) val | [SpanElement](pony_check-SpanElement.md) val)

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