patternAttachment property
patternAttachment Specifies a value that the value in the instance
SHALL follow - that is, any value in the pattern must be found in the
instance. Other additional values may be found too. This is effectively
constraint by example.
When patternx is used to constrain a primitive, it means that the value
provided in the patternx must match the instance value exactly.
When patternx is used to constrain an array, it means that each element
provided in the patternx array must (recursively) match at least one
element from the instance array.
When patternx is used to constrain a complex object, it means that each
property in the pattern must be present in the complex object, and its
value must recursively match -- i.e.,
- If primitive: it must match exactly the pattern value
- If a complex object: it must match (recursively) the pattern value
- If an array: it must match (recursively) the pattern value.
Implementation
Attachment? get patternAttachment => throw _privateConstructorUsedError;