importPrefixesOf method
Returns all the prefixes of the imports of a file.
if id is a part file, it returns the prefixes of the imports of the main file.
Implementation
@override
Set<String> importPrefixesOf(String id) {
final Set<String> prefixes = <String>{};
String targetSrc = getParentSrc(id);
for (final List<dynamic> import in importsOf(
targetSrc,
includeParts: false,
)) {
final String? prefix = import.elementAtOrNull(GraphIndex.directivePrefix);
if (prefix != null) {
prefixes.add(prefix);
}
}
return prefixes;
}