UnityEditor.MaterialPropertyHandler.GetShaderPropertyDrawer C# (CSharp) Method

        private static MaterialPropertyDrawer GetShaderPropertyDrawer(string attrib, out bool isDecorator)
        {
            isDecorator = false;
            string str = attrib;
            string argsText = string.Empty;
            Match match = Regex.Match(attrib, @"(\w+)\s*\((.*)\)");
            if (match.Success)
            {
                str = match.Groups[1].Value;
                argsText = match.Groups[2].Value.Trim();
            }
            foreach (Type type in EditorAssemblies.SubclassesOf(typeof(MaterialPropertyDrawer)))
            {
                if (((type.Name == str) || (type.Name == (str + "Drawer"))) || (((type.Name == ("Material" + str + "Drawer")) || (type.Name == (str + "Decorator"))) || (type.Name == ("Material" + str + "Decorator"))))
                {
                    try
                    {
                        isDecorator = type.Name.EndsWith("Decorator");
                        return CreatePropertyDrawer(type, argsText);
                    }
                    catch (Exception)
                    {
                        object[] args = new object[] { str, argsText };
                        Debug.LogWarningFormat("Failed to create material drawer {0} with arguments '{1}'", args);
                        return null;
                    }
                }
            }
            return null;
        }

        private static MaterialPropertyHandler GetShaderPropertyHandler(Shader shader, string name)
        {
            string[] propertyAttributes = ShaderUtil.GetShaderPropertyAttributes(shader, name);
            if (propertyAttributes == null || propertyAttributes.Length == 0)
            {
                return((MaterialPropertyHandler)null);
            }
            MaterialPropertyHandler materialPropertyHandler = new MaterialPropertyHandler();

            foreach (string attrib in propertyAttributes)
            {
                bool isDecorator;
                MaterialPropertyDrawer shaderPropertyDrawer = MaterialPropertyHandler.GetShaderPropertyDrawer(attrib, out isDecorator);
                if (shaderPropertyDrawer != null)
                {
                    if (isDecorator)
                    {
                        if (materialPropertyHandler.m_DecoratorDrawers == null)
                        {
                            materialPropertyHandler.m_DecoratorDrawers = new List <MaterialPropertyDrawer>();
                        }
                        materialPropertyHandler.m_DecoratorDrawers.Add(shaderPropertyDrawer);
                    }
                    else
                    {
                        if (materialPropertyHandler.m_PropertyDrawer != null)
                        {
                            Debug.LogWarning((object)string.Format("Shader property {0} already has a property drawer", (object)name), (UnityEngine.Object)shader);
                        }
                        materialPropertyHandler.m_PropertyDrawer = shaderPropertyDrawer;
                    }
                }
            }
            return(materialPropertyHandler);
        }