vscode points me to the types only code example
Example: custom folding vscode
Language Start region End region
Bat ::#region or REM #region ::#endregion or REM #endregion
C# #region #endregion
C/C++ #pragma region #pragma endregion
CSS/Less/SCSS /*#region*/ /*#endregion*/
Coffeescript #region #endregion
F# //#region or (#_region) //#endregion or (#_endregion)
Java //#region or //<editor-fold> // #endregion or //</editor-fold>
Markdown
Perl5 #region or =pod #endregion or =cut
PHP #region #endregion
PowerShell #region #endregion
Python #region or # region #endregion or # endregion
TypeScript/JavaScript //#region //#endregion
Visual Basic #Region #End Region