# `AshGrant.Transformers.ValidateFieldGroups`
[🔗](https://github.com/jhlee111/ash_grant/blob/v0.14.1/lib/ash_grant/transformers/validate_field_groups.ex#L1)

Validates field group definitions at compile time.

Checks for:
- Duplicate field group names
- References to undefined parent field groups
- Circular inheritance chains
- mask fields without mask_with function

# `after_compile?`

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*Consult [api-reference.md](api-reference.md) for complete listing*