resolveFile method
Parses a file and returns the resolved AST.
Implementation
Future<ResolvedUnitResult?> resolveFile(String filePath) async {
final absolutePath = path.absolute(filePath);
final context = _contextCollection.contextFor(absolutePath);
final result = await context.currentSession.getResolvedUnit(absolutePath);
if (result is ResolvedUnitResult) {
return result;
}
return null;
}