SAP MDG Data transfer using DIF

Hello All,

I want to import data from CSV file. I need to code in method IF_EX_MDG_FILECONVERTER~GET_DATA in BADI implementation.

Please guide me for the same.

I have code for Business Partner entity which includes Proxy Structure (generated) for BP like  mdg_bp_bp_suitebulk_repl_req, MDG_BP_BPSUITERPLCT_REQ_MSG.

I do not know the Proxy Structure (generated) for MM entity.

Please let me know the way to Import data from CSV file through DIF.

Attaching code snippet.