public RefactoringStatus checkInitialConditions(IProgressMonitor pm) throws CoreException {
RefactoringStatus result = new RefactoringStatus();
if (fSourceProvider == null && Invocations.isInvocation(fInitialNode)) {
fSourceProvider = resolveSourceProvider(result, fInitialTypeRoot, fInitialNode);
if (result.hasFatalError()) return result;
}
result.merge(fSourceProvider.checkActivation());
result.merge(fTargetProvider.checkActivation());
return result;
}
