SAP MDG: How to call Change Request ID & Change Request Type

DATA: lv_cr_id TYPE usmd_crequest, lv_cr_type TYPE usmd_crequest_type. cl_usmd_app_context->get_context( )->get_attributes( IMPORTING ev_crequest_id = lv_cr_id ev_crequest_type = lv_cr_type ). Thanks,Sandeep Suggu.