ResolveType

private IEnumerable<Declaration> CurrentScopeDeclarations()
{
    return _declarations.Where(item =>
        item.DeclarationType == DeclarationType.UserDefinedType
        && item.Project == _currentScope.Project
        && item.ComponentName == _currentScope.ComponentName);
}

private IEnumerable<Declaration> CurrentProjectDeclarations()
{
    return _declarations.Where(item =>
        _moduleTypes.Contains(item.DeclarationType)
        && item.Project == _currentScope.Project);
}

private IEnumerable<Declaration> CurrentModuleDeclarations()
{
    return _declarations.Where(item =>
        _moduleTypes.Contains(item.DeclarationType));
}

private Declaration ResolveType(Declaration parent)
{
    if (parent == null || parent.AsTypeName == null)
        return null;

    var identifier = parent.AsTypeName.Split('.').Last();
    var declarationIsIdentifierPredicate = new Func<Declaration, bool>(d => d.IdentifierName == identifier);

    return
        CurrentScopeDeclarations().SingleOrDefault(declarationIsIdentifierPredicate) ??
        CurrentProjectDeclarations().SingleOrDefault(declarationIsIdentifierPredicate) ??
        CurrentModuleDeclarations().SingleOrDefault(declarationIsIdentifierPredicate);
}