SAP Function Module search on GM_DR
Search FMs
GM_DRB_DOCUMENT_DISPLAY - DRB: GM document display
GM_DRB_FORMAT - DRB: Format of GM document
GM_DRB_OBJTYPE_TEXT_GET - DRB: Get text to object type
GM_DRB_ORIGIN_GET - DRB: Retrieve Data origin
GM_DRB_RELATIONS_GET - DRB: Get related GM documents
Return Table index