struct casewriter *sfm_open_writer (struct file_handle *, struct dictionary *,
struct sfm_write_options);
struct sfm_write_options sfm_writer_default_options (void);
struct casewriter *sfm_open_writer (struct file_handle *, struct dictionary *,
struct sfm_write_options);
struct sfm_write_options sfm_writer_default_options (void);