data : lo_func_import_context type ref to /iwbep/if_mgw_req_func_import,
          lt_parameters          type /iwbep/t_mgw_name_value_pair.
  
   "read parameters
        lo_func_import_context ?= <lfs_changeset_request>-request_context .
        lt_parameters = lo_func_import_context->get_parameters( ). "name/value pair
        ls_flight_con_status-carrid = lt_parameters[ name = 'AIRLINE' ]-value .
        ls_flight_con_status-connid = lt_parameters[ name = 'FLIGHTCONNECTION' ]-value .

As per: https://community.sap.com/t5/technology-blog-posts-by-members/fiori-elements-list-add-and-implement-action-button/ba-p/13413889