protected void SetPropertyString(string name, string value)
 {
     if (value == null)
     {
         m_Properties.Remove(name);
     }
     else
     {
         m_Properties.SetString(name, value);
     }
 }
        public override void UpdateProps()
        {
            SetPropertyString("fileRef", fileRef);

            PBXElementDict settings = null;

            if (m_Properties.Contains("settings"))
            {
                settings = m_Properties["settings"].AsDict();
            }

            if (compileFlags != null && compileFlags != "")
            {
                if (settings == null)
                {
                    settings = m_Properties.CreateDict("settings");
                }
                settings.SetString("COMPILER_FLAGS", compileFlags);
            }
            else
            {
                if (settings != null)
                {
                    settings.Remove("COMPILER_FLAGS");
                }
            }

            if (weak)
            {
                if (settings == null)
                {
                    settings = m_Properties.CreateDict("settings");
                }
                PBXElementArray attrs = null;
                if (settings.Contains("ATTRIBUTES"))
                {
                    attrs = settings["ATTRIBUTES"].AsArray();
                }
                else
                {
                    attrs = settings.CreateArray("ATTRIBUTES");
                }

                bool exists = false;
                foreach (var value in attrs.values)
                {
                    if (value is PBXElementString && value.AsString() == "Weak")
                    {
                        exists = true;
                    }
                }
                if (!exists)
                {
                    attrs.AddString("Weak");
                }
            }
            else
            {
                if (settings != null && settings.Contains("ATTRIBUTES"))
                {
                    var attrs = settings["ATTRIBUTES"].AsArray();
                    attrs.values.RemoveAll(el => (el is PBXElementString && el.AsString() == "Weak"));
                    if (attrs.values.Count == 0)
                    {
                        settings.Remove("ATTRIBUTES");
                    }
                }
            }

            if (assetTags.Count > 0)
            {
                if (settings == null)
                {
                    settings = m_Properties.CreateDict("settings");
                }
                var tagsArray = settings.CreateArray("ASSET_TAGS");
                foreach (string tag in assetTags)
                {
                    tagsArray.AddString(tag);
                }
            }
            else
            {
                if (settings != null)
                {
                    settings.Remove("ASSET_TAGS");
                }
            }

            if (settings != null && settings.values.Count == 0)
            {
                m_Properties.Remove("settings");
            }
        }