Function isFieldDefined

isFieldDefined<T, K>(key): ((value) => value is NonNullableField<T, K>)
Type Parameters
- T
- K extends string | number | symbol
Parameters
- key: K
Returns ((value) => value is NonNullableField<T, K>)
- - (value): value is NonNullableField<T, K>
  - Parameters
    - value: T
    Returns value is NonNullableField<T, K>
- Defined in src/type-util.ts:5