Message Containers to show error messages in odata DPC EXT classes

data lt_return type table of bapiret2.

//

 READ TABLE lt_return TRANSPORTING NO FIELDS WITH KEY type = 'E'.

        IF sy-subrc = 0.

          CALL METHOD mo_context->get_message_container( )->add_messages_from_bapi(

            EXPORTING

              it_bapi_messages          = lt_return

              iv_determine_leading_msg  = /iwbep/if_message_container=>gcs_leading_msg_search_option-first ).

          RAISE EXCEPTION TYPE /iwbep/cx_mgw_busi_exception

            EXPORTING

              textid            = /iwbep/cx_mgw_busi_exception=>business_error

              message_container = mo_context->get_message_container( ).

        ENDIF.