Working with collections wrapper

In CRM : Work Area's equivalent is Entity

               Internal Tables equivalent is Collection Wrapper.

So - for a table - you would have to add multiple entities into a collection wrapper - 

which in turn would be displayed on UI on its own.

Entity reference Class is                     : CL_CRM_BOL_ENTITY

Collection Wrapper reference Class is: CL_BSP_WD_COLLECTION_WRAPPER.

 DATA: lr_btadmini       TYPE REF TO cl_crm_bol_entity,
        lv_wrapper        TYPE REF TO cl_bsp_wd_collection_wrapper,
        lr_entity         TYPE REF TO cl_crm_bol_entity,
        lv_zzfld000002    TYPE char10 ,
        lv_adrc           TYPE adrc ,
        l7_msg_service    TYPE REF TO cl_bsp_wd_message_service,
        lvsp_msg_v1       TYPE string VALUE 'Please enter the correct address',
        lv_size           type char2 .


  lv_wrapper = me->ztyped_context->zbtadmini->get_collection_wrapper( ).
  lv_size    = lv_wrapper->size( ).
  IF  lv_wrapper IS BOUND .

    lr_entity  ?= lv_wrapper->get_first( ). : Switching pointer to first record (entity)


    WHILE lr_entity IS BOUND.  : Loop in the wrapper 

      lv_zzfld000002 = lr_entity->get_property_as_string( 'ZZFLD000002' ).      lr_entity  ?= lv_wrapper->get_next( ). 

    ENDWHILE.

  ENDIF .