UnityEditor.SpeedTreeImporter.SetMaterialVersionToCurrent C# (CSharp) Method

        internal extern void SetMaterialVersionToCurrent();

        protected override bool ApplyRevertGUIButtons()
        {
            EditorGUI.BeginDisabledGroup(!this.HasModified());
            base.RevertButton();
            bool result = base.ApplyButton("Apply Prefab");

            EditorGUI.EndDisabledGroup();
            bool       upgradeMaterials = this.upgradeMaterials;
            GUIContent content          = (!this.HasModified() && !upgradeMaterials) ? SpeedTreeImporterInspector.Styles.Regenerate : SpeedTreeImporterInspector.Styles.ApplyAndGenerate;

            if (GUILayout.Button(content, new GUILayoutOption[0]))
            {
                bool flag = this.HasModified();
                if (flag)
                {
                    this.Apply();
                }
                if (upgradeMaterials)
                {
                    SpeedTreeImporter[] importers = this.importers;
                    for (int i = 0; i < importers.Length; i++)
                    {
                        SpeedTreeImporter speedTreeImporter = importers[i];
                        speedTreeImporter.SetMaterialVersionToCurrent();
                    }
                }
                this.GenerateMaterials();
                if (flag || upgradeMaterials)
                {
                    base.ApplyAndImport();
                    result = true;
                }
            }
            return(result);
        }