internal static void UpdateSpriteAsset(TMP_SpriteAsset spriteAsset)
        {
            // Get a list of all the sprites contained in the texture referenced by the sprite asset.
            // This only works if the texture is set to sprite mode.
            string filePath = AssetDatabase.GetAssetPath(spriteAsset.spriteSheet);

            if (string.IsNullOrEmpty(filePath))
            {
                return;
            }

            // Get all the sprites defined in the sprite sheet texture referenced by this sprite asset.
            Sprite[] sprites = AssetDatabase.LoadAllAssetsAtPath(filePath).Select(x => x as Sprite).Where(x => x != null).ToArray();

            // Return if sprite sheet texture does not have any sprites defined in it.
            if (sprites.Length == 0)
            {
                Debug.Log("Sprite Asset <color=#FFFF80>[" + spriteAsset.name + "]</color>'s atlas texture does not appear to have any sprites defined in it. Use the Unity Sprite Editor to define sprites for this texture.", spriteAsset.spriteSheet);
                return;
            }

            List <TMP_SpriteGlyph> spriteGlyphTable = spriteAsset.spriteGlyphTable;

            // Find available glpyh indexes
            uint[]      existingGlyphIndexes  = spriteGlyphTable.Select(x => x.index).ToArray();
            List <uint> availableGlyphIndexes = new List <uint>();

            uint lastGlyphIndex = existingGlyphIndexes.Length > 0 ? existingGlyphIndexes.Last() : 0;
            int  elementIndex   = 0;

            for (uint i = 0; i < lastGlyphIndex; i++)
            {
                uint existingGlyphIndex = existingGlyphIndexes[elementIndex];

                if (i == existingGlyphIndex)
                {
                    elementIndex += 1;
                }
                else
                {
                    availableGlyphIndexes.Add(i);
                }
            }

            // Iterate over sprites contained in the updated sprite sheet to identify new and / or modified sprites.
            for (int i = 0; i < sprites.Length; i++)
            {
                Sprite sprite = sprites[i];

                // Check if current sprites is already contained in the sprite glyph table of the sprite asset.
                TMP_SpriteGlyph spriteGlyph = spriteGlyphTable.FirstOrDefault(x => x.sprite == sprite);

                if (spriteGlyph != null)
                {
                    // update existing sprite glyph
                    if (spriteGlyph.glyphRect.x != sprite.rect.x || spriteGlyph.glyphRect.y != sprite.rect.y || spriteGlyph.glyphRect.width != sprite.rect.width || spriteGlyph.glyphRect.height != sprite.rect.height)
                    {
                        spriteGlyph.glyphRect = new GlyphRect(sprite.rect);
                    }
                }
                else
                {
                    TMP_SpriteCharacter spriteCharacter;

                    // Check if this sprite potentially exists under the same name in the sprite character table.
                    if (spriteAsset.spriteCharacterTable != null && spriteAsset.spriteCharacterTable.Count > 0)
                    {
                        spriteCharacter = spriteAsset.spriteCharacterTable.FirstOrDefault(x => x.name == sprite.name);
                        spriteGlyph     = spriteCharacter != null ? spriteGlyphTable[(int)spriteCharacter.glyphIndex] : null;

                        if (spriteGlyph != null)
                        {
                            // Update sprite reference and data
                            spriteGlyph.sprite = sprite;

                            if (spriteGlyph.glyphRect.x != sprite.rect.x || spriteGlyph.glyphRect.y != sprite.rect.y || spriteGlyph.glyphRect.width != sprite.rect.width || spriteGlyph.glyphRect.height != sprite.rect.height)
                            {
                                spriteGlyph.glyphRect = new GlyphRect(sprite.rect);
                            }
                        }
                    }

                    // Add new Sprite Glyph to the table
                    spriteGlyph = new TMP_SpriteGlyph();

                    // Get available glyph index
                    if (availableGlyphIndexes.Count > 0)
                    {
                        spriteGlyph.index = availableGlyphIndexes[0];
                        availableGlyphIndexes.RemoveAt(0);
                    }
                    else
                    {
                        spriteGlyph.index = (uint)spriteGlyphTable.Count;
                    }

                    spriteGlyph.metrics   = new GlyphMetrics(sprite.rect.width, sprite.rect.height, -sprite.pivot.x, sprite.rect.height - sprite.pivot.y, sprite.rect.width);
                    spriteGlyph.glyphRect = new GlyphRect(sprite.rect);
                    spriteGlyph.scale     = 1.0f;
                    spriteGlyph.sprite    = sprite;

                    spriteGlyphTable.Add(spriteGlyph);

                    spriteCharacter       = new TMP_SpriteCharacter(0xFFFE, spriteGlyph);
                    spriteCharacter.name  = sprite.name;
                    spriteCharacter.scale = 1.0f;

                    spriteAsset.spriteCharacterTable.Add(spriteCharacter);
                }
            }

            // Update Sprite Character Table to replace unicode 0x0 by 0xFFFE
            for (int i = 0; i < spriteAsset.spriteCharacterTable.Count; i++)
            {
                TMP_SpriteCharacter spriteCharacter = spriteAsset.spriteCharacterTable[i];
                if (spriteCharacter.unicode == 0)
                {
                    spriteCharacter.unicode = 0xFFFE;
                }
            }

            // Sort glyph table by glyph index
            spriteAsset.SortGlyphTable();
            spriteAsset.UpdateLookupTables();
            TMPro_EventManager.ON_SPRITE_ASSET_PROPERTY_CHANGED(true, spriteAsset);
        }
        internal static void UpdateSpriteAsset(TMP_SpriteAsset spriteAsset)
        {
            // Get a list of all the sprites contained in the texture referenced by the sprite asset.
            // This only works if the texture is set to sprite mode.
            string filePath = AssetDatabase.GetAssetPath(spriteAsset.spriteSheet);

            if (string.IsNullOrEmpty(filePath))
            {
                return;
            }

            // Get all the Sprites sorted Left to Right / Top to Bottom
            Sprite[] sprites = AssetDatabase.LoadAllAssetsAtPath(filePath).Select(x => x as Sprite).Where(x => x != null).OrderByDescending(x => x.rect.y).ThenBy(x => x.rect.x).ToArray();

            List <TMP_SpriteGlyph> spriteGlyphTable = spriteAsset.spriteGlyphTable;

            // Finding available glyph indexes to insert new glyphs into.
            var         tempGlyphTable        = spriteGlyphTable.OrderBy(glyph => glyph.index).ToList();
            List <uint> availableGlyphIndexes = new List <uint>();

            int elementIndex = 0;

            for (uint i = 0; i < tempGlyphTable[tempGlyphTable.Count - 1].index; i++)
            {
                uint currentElementIndex = tempGlyphTable[elementIndex].index;

                if (i == currentElementIndex)
                {
                    elementIndex += 1;
                }
                else
                {
                    availableGlyphIndexes.Add(i);
                }
            }

            // Iterate over each of the sprites in the texture to try to match them to existing sprites in the sprite asset.
            for (int i = 0; i < sprites.Length; i++)
            {
                int id = sprites[i].GetInstanceID();

                int glyphIndex = spriteGlyphTable.FindIndex(item => item.sprite.GetInstanceID() == id);

                if (glyphIndex == -1)
                {
                    // Add new Sprite Glyph to the table
                    Sprite sprite = sprites[i];

                    TMP_SpriteGlyph spriteGlyph = new TMP_SpriteGlyph();

                    // Get available glyph index
                    if (availableGlyphIndexes.Count > 0)
                    {
                        spriteGlyph.index = availableGlyphIndexes[0];
                        availableGlyphIndexes.RemoveAt(0);
                    }
                    else
                    {
                        spriteGlyph.index = (uint)spriteGlyphTable.Count;
                    }

                    spriteGlyph.metrics   = new GlyphMetrics(sprite.rect.width, sprite.rect.height, -sprite.pivot.x, sprite.rect.height - sprite.pivot.y, sprite.rect.width);
                    spriteGlyph.glyphRect = new GlyphRect(sprite.rect);
                    spriteGlyph.scale     = 1.0f;
                    spriteGlyph.sprite    = sprite;

                    spriteGlyphTable.Add(spriteGlyph);

                    TMP_SpriteCharacter spriteCharacter = new TMP_SpriteCharacter(0, spriteGlyph);
                    spriteCharacter.name  = sprite.name;
                    spriteCharacter.scale = 1.0f;

                    spriteAsset.spriteCharacterTable.Add(spriteCharacter);
                }
                else
                {
                    // Look for changes in existing Sprite Glyph
                    Sprite sprite = sprites[i];

                    TMP_SpriteGlyph spriteGlyph = spriteGlyphTable[glyphIndex];

                    // We only update changes to the sprite position / glyph rect.
                    if (spriteGlyph.glyphRect.x != sprite.rect.x || spriteGlyph.glyphRect.y != sprite.rect.y || spriteGlyph.glyphRect.width != sprite.rect.width || spriteGlyph.glyphRect.height != sprite.rect.height)
                    {
                        spriteGlyph.glyphRect = new GlyphRect(sprite.rect);
                    }
                }
            }

            // Sort glyph table by glyph index
            spriteAsset.SortGlyphTable();
            spriteAsset.UpdateLookupTables();
            TMPro_EventManager.ON_SPRITE_ASSET_PROPERTY_CHANGED(true, spriteAsset);
        }