Is local class supported for a global class in BTP ABAP enviroment?

[Zhao]

In BTP ABAP environment,  I would like to create a local class under a global class (similar with SE24 in on-premise system ). However, it shows syntax error.

If it is supported, can anyone provide the sample code?

Thank you in advance.

[Sandra_Rossi]

Example (see also official ABAP documentation examples):

CLASS lcl_app DEFINITION
    FINAL
    CREATE PRIVATE.
  PUBLIC SECTION.
    CLASS-METHODS create
      RETURNING
        VALUE(result) TYPE REF TO lcl_app.
ENDCLASS.

CLASS lcl_app IMPLEMENTATION.
  METHOD create.
    result = NEW lcl_app( ).
  ENDMETHOD.
ENDCLASS.