Cast data references
Cast reference types to other reference types using the CAST #( ) operator.
DATA(my_account) = CAST account( NEW bank_account( ) ).Old style:
DATA my_account TYPE REF TO account.
CREATE OBJECT my_account TYPE bank_account.or
DATA my_account TYPE REF TO account.
DATA my_bank_account TYPE REF TO bank_account.
CREATE OBJECT my_bank_account.
my_account ?= bank_account.