fit method
Implementation
void fit(List<dynamic> values) {
_categories = values.toSet().toList();
_categoryToIndex = {
for (int i = 0; i < _categories.length; i++) _categories[i]: i
};
if (handleUnknown && this.unknownVector.isEmpty) {
this.unknownVector.addAll(List.filled(_categories.length, 0));
}
_isFitted = true;
}