Enum Values 

enum Values<'a> {
    Explicit(&'a [(&'a Field, Option<&'a (dyn Value + 'a)>)]),
    All(&'a [Option<&'a (dyn Value + 'a)>]),
}

Variants

Explicit(&'a [(&'a Field, Option<&'a (dyn Value + 'a)>)])

A set of field-value pairs. Fields may be for the wrong field set, some fields may be missing, and fields may be in any order.

All(&'a [Option<&'a (dyn Value + 'a)>])

A list of values corresponding exactly to the fields in a FieldSet.