assert referencingCU.isInvisible();
try
{
final Collection<IDefinition> externallyVisibleDefs =
referencingCU.getFileScopeRequest().get().getExternallyVisibleDefinitions();
final ICompilerProject project = referencingCU.getProject();
for (IDefinition externallyVisibleDefinition : externallyVisibleDefs)
{
if (baseName.equals(externallyVisibleDefinition.getBaseName()))
accumulateMatchingDefinitions(referencingCU, project, defs, namespaceSet, true, null, externallyVisibleDefinition);
}