pub unsafe extern fn rocksdb_slicetransform_create(state: *mut c_void, destructor: Option<extern fn(arg1: *mut c_void)>, transform: Option<extern fn(arg1: *mut c_void, key: *const c_char, length: size_t, dst_length: *mut size_t) -> *mut c_char>, in_domain: Option<extern fn(arg1: *mut c_void, key: *const c_char, length: size_t) -> c_uchar>, in_range: Option<extern fn(arg1: *mut c_void, key: *const c_char, length: size_t) -> c_uchar>, name: Option<extern fn(arg1: *mut c_void) -> *const c_char>) -> *mut rocksdb_slicetransform_t