findOneByMatcher<T extends DartElement> method
T?
findOneByMatcher<T extends DartElement>({
- required DartElementMatcher matcher,
- required DartElementsParent<
DartElement> source,
Implementation
T? findOneByMatcher<T extends DartElement>({
required DartElementMatcher matcher,
required DartElementsParent source,
}) {
final elementsFound = findByMatcher<T>(matcher: matcher, source: source);
if (elementsFound.length == 1) {
return elementsFound.first;
} else if (elementsFound.isEmpty) {
return null;
} else {
throw MultipleElementsFoundException(
matcher: matcher,
source: source,
elementsFound: elementsFound,
);
}
}