Example Value|Model - JSONGenerateBulkRequest{documentId string id of the templateformat string output format docx or pdf. Default docxoutputFileName string file name for the output file.sheetindex string index of sheet containing values. Optional e.g 1, 2 etc. applicable for xlsxheadersin string whether row or column contains the header applicable only for xlsx input. Optional e.g row, columnkeyToFileName string Name of the tag value of which can be used for generated files. OptionalheaderMappings string Json representing mappings e.g tag X in document should take values from key Y from provided JSON then {X:Y}. Optional}