Function tdb_core::dtf::file_format::scan_files_for_range_for_each

pub fn scan_files_for_range_for_each<F: for<'a> FnMut(&'a Update)>(
    folder: &str, 
    symbol: &str, 
    min_ts: u64, 
    max_ts: u64, 
    f: &mut F
) -> Result<(), Error>

search every matching dtf file under folder for timestamp range