LabeledList<E>.from constructor
Constructs a new LabeledList from elements
.
If elements
is a List, the returned LabeledList will wrap it;
otherwise, a new List will be constructed from elements
.
Note: Use the LabeledList.of constructor to construct a new LabeledList containing the elements of a List, without referencing the original list.
If labels
are provided, there must be a label or a null
value for
every element in in the list. labels.length
must equal the length of
the list.
If growable
is false
, the returned list will be a fixed-length
list, otherwise the list is growable and identical to the default
constructor.
Implementation
LabeledList.from(
Iterable<E> elements, {
Iterable<String?>? labels,
bool growable = true,
}) : assert(labels == null || labels.length == elements.length),
_labels = _buildLabels(labels, elements.length, growable: growable),
super(
elements is List<E>
? elements
: List<E>.from(elements, growable: growable),
growable: growable,
);