int function ( ) { return partLength ; }
get size of part . not calculated until part has been written concode_field_sep int partLength concode_elem_sep String contentDisposition concode_elem_sep String contentType concode_elem_sep String contentTransferEncoding concode_field_sep void setTransferEncoding concode_elem_sep void setDisposition concode_elem_sep void setContentType concode_elem_sep void write